Cup

Cup (pronounced kuhp)

(1) A small, open container now manufactured usually using ceramics, plastic, glass or metal, typically with a single handle and used as a receptacle from which to drink fluids (tea, coffee, soup etc) and often categorized by design according to their nominal use (tea cup, coffee cup etc); many cups are supplied in sets with a saucer on which the cup sits protecting surfaces from spillage and offer a place on which a stirring spoon may sit.  A cup can be made from glass but may not be a “glass” while a glass made from glass may also have a handle while mugs are essentially cups but called something else.

(2) The bow-like part of a goblet or the like.

(3) A cup with its contents (“a cup of tea” et al).

(4) The quantity contained in a cup (which can be a general reference to any cup or a precisely defined measure).

(5) As a customary unit of measure, a defined unit of capacity frequently used in cooking, the quantum of which varies between (and sometimes within) markets but historically based on a half pint (now usually expressed as 220-250 ml or 14-20 tablespoons).  Measuring cups are available with graduations.

(6) An ornamental bowl, vase, etc especially of precious metal, offered as a prize for a contest (the use of “cup” often persisting even when trophies have been re-designed in a different form); a sporting contest in which a cup (or some other trophy) is awarded to the winner (collective known as the “cup competitions”).

(7) Any of various mixed beverages with one ingredient as a base and historically served from a bowl (claret cup burgundy cup, gin cup, cider cup etc).

(8) In Christianity, the chalice used in the Eucharist (used also of the consecrated wine of the Eucharist).

(9) Something to be partaken of or endured; one's portion, as of joy or suffering.

(10) In many fields, any cup-like utensil, organ, part, cavity etc; anything resembling a cup in shape or function.

(11) In botany, parts such as the flower base of some plants.

(12) In women’s underwear, the two forms containing the breasts in a bra or other garment in which an apparatus with a similar function is integrated (camisoles, bathing suits etc).

(13) In certain sports, a concave protective covering for the male genitalia, reinforced with usually with rigid plastic or metal (in some markets called a “box”, “cup” the common form in North America).

(14) In golf-course construction, the metal receptacle within the hole or the hole itself.

(15) In astronomy, a constellation or a crater.

(16) In pre-modern medicine, as “cupping glass”, a glass vessel from which air can be removed by suction or heat to create a partial vacuum, formerly used in drawing blood to the surface of the skin for slow blood-letting (also called the “artificial leech”).  The concept (cupping) remains in use (though without the blood-letting) in certain beauty treatments popular in East-Asia.

(17) In metalworking, a cylindrical shell closed at one end, especially one produced in the first stages of a deep-drawing operation; to form (tubing, containers etc) by punching hot strip or sheet metal and drawing it through a die.

(18) In mathematics, the cup-like symbol ∪, used to indicate the union of two sets.

(19) As CUP, the international standard (ISO 4217) currency code for the Cuban peso.

(20) In tarot card reading, a suit of the minor arcana or one of the cards from the suit.

(21) In ultimate frisbee competition, a defensive style characterized by a three player near defense cupping the thrower (or those three players).

(22) A flexible concave membrane used temporarily to attach a handle or hook to a flat surface by means of suction (the “suction cup”, the origins of which were in biomimicry (octopodes et al)).

(23) To take or place in, or as in, a cup.

(24) To form into a cuplike shape.

Pre-1000: From the Middle English cuppe & coppe, created by a blending of the Old English cuppe (cup) and the & Old Northumbrian copp (cup, vessel), from the Late Latin cuppa which etymologists list as being of uncertain origin but thought probably a variant of the earlier cūpa (tub, cask, tun, barrel) which may have been cognate with the Sanskrit kupah (hollow, pit, cave), the Greek kype (gap, hole; a kind of ship), the Old Church Slavonic kupu, the Lithuanian kaupas, the Old Norse hufr (ship's hull) and the Old English hyf (beehive).  Etymologists are divided on whether the source of the original Latin was the primitive Indo-European kewp- (a hollow) or the non Indo-European loanword kup- which was borrowed by and from many languages.  The Old English copp was from the Proto-West Germanic kopp (round object, bowl, vessel, knoll, summit, crown of the head), from the Proto-Germanic kuppaz, from the primitive Indo-European gew- (to bend, curve, arch), the source also of the obsolete English cop (top, summit, crown of the head) and the German Kopf (top, head).  The Middle English word evolved also under the influence of the Anglo-Norman cupe & the Old French cope & coupe.  The Late Latin cuppa begat many words meaning “cup” including the Old French coupe, the Saterland Frisian & West Frisian kop, the Old Frisian kopp, the Italian coppa, the Middle Dutch coppe, the Dutch kop & kopje, the Middle Low German kopp, the German Low German Koppke & Köppke, the Danish kop, the Spanish copa and the Swedish kopp.  It was a doublet of coupe, hive and keeve.  The German cognate Kopf now means exclusively “head”.  The first cups doubtlessly were formed by a “cupping” of the hands in order to drink and that action would have been pre-human and an important evolutionary step in the development of the brain.  Later, whatever fell conveniently to hand (sea-shells, the shells of nuts etc) would have been used before drinking vessels came to be fashioned from clay, wood or other materials.  Cup is a noun & verb, cupped & cupping are verbs; the noun plural is cups.

Art Deco and the coffee cup.

By the late fourteenth century, “cup” had come to be used of just about in the shape of what is now understood as a cup, the sense of “quantity contained in a cup” emerging about the same time.  The sense of a “cup-shaped metal vessel offered as a prize in sport or games” dates from the 1640s, the origin thought to be the traditional ceremonial ritual of celebrating victory by drinking wine or some other alcoholic brew and while it’s speculative, anthropologists have suggested there may be some symbolic link with the idea of “drinking the blood of the vanquished”.  The idea obviously persists, and among the more disgusting versions is drinking from a shoe or boot worn by the victor during the event.  That particular form of podophilic mixology actually has a long history but of late it’s become something of a fetish on the podiums in motor-sport; the term “shoey” was coined in the barbarian nation of Australia.

The origin of the use of “one cup in life” is in the Biblical scripture: And he went a little further, and fell on his face, and prayed, saying, O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as thou wilt. (Matthew 26:39 (King James Version (KJV, 1611))).

The word cup appears in many scriptural verses which refer to God's judgment or a time of great suffering, Christ Himself asking James and John if they could "drink the cup" (Matthew 20:22) assigned to Him (by which he meant the suffering that He would soon endure on the cross, experiencing God's judgment for the sins of humanity.  It’s an important theological point, emphasized (Hebrews 4:15) by Jesus seeming to be overwhelmed and saddened by the prospect and awfulness of his crucifixion, praying to God he be spared this fate.  Jesus was, although the son of God, also fully human and few humans wish to suffer humiliation, torture, and death so his prayer was natural but critically, almost at once he submits and resolves to obey the will of the Father.  Whatever his human anguish at what is to come, his absolute commitment is to obeying God.  The idea then is that “suffering is to be endured” was by the fourteenth century expressed in phrases like “the cup of life” and whatever may be the cup, it is “something to be partaken of” because it is the will of God.  In figurative use thus, “one’s cup” is that which is one’s lot to be endured; that which is allotted to one for good and bad.

The daffodil (one of the common names of flowers of the genus Narcissus); as in many flowers, the alternative name for the corona is the cup.

To be in one's cups was to be “intoxicated”, a use dating from the 1610s which may have been a direct development from the mid-fourteenth century Middle English cup-shoten (drunk, drunken).  One’s “cup of tea” is what interests one and came into use in the 1930s of things or concepts although it’s documented from 1908 applying to persons; tellingly, the use of “not my cup of tea” is more common.  The “cup-bearer” was an early fifteenth century job description to describe the “attendant at a feast who conveys wine or other liquor to guests” but a more specialized use was of the court official who carried with him the cups, plates and other utensils to be used by those fearing poisoning (usually royalty or feudal barons).  The phrase “storm in a tea cup” refers to a fuss being made over a trivial matter and is in the same vein as “much ado about nothing”, “tempest in a teapot”, “storm in a teapot”, “lightning in a bottle” and “make a mountain out of a molehill”.

America's Cup (left), FIFA World Cup (centre) and William Webb Ellis Cup (left).

In sport, cups are a popular choice as trophies and they range from small ones in anodised plastic to large, heavy constructions plated in gold or silver.  The America's Cup is contested in yacht racing and, first awarded in 1870, is the oldest international sporting competition still running.  Informally, competitors call it the “Auld Mug”.  The Fédération Internationale de Football Association’s (FIFA, the International Federation of Association Football) World Cup was first contested in 1930 with the tournament since run at four year intervals (skipping 1942 & 1946 because of World War II (1939-1945)).  The name “World Cup” remains although the trophy hasn’t, in the conventional sense of the word, actually been a cup since 1974, the last year the finals were contested by 16 teams (there will be 48 in 2026).  The Webb Ellis Cup is the premier trophy in international rugby and since 1987 tournaments have been run every four years.  The cup is named after English Anglican clergyman William Webb Ellis (1806–1872) who, according to legend, while a pupil at Rugby School, Webb Ellis ignored the rules of the football game he was playing, picking up the ball and running with it “…thereby creating rugby.”  There’s no satisfactory evidence to support the tale and within the game there’s the joke what Webb Ellis invented was rugby's (some say Rugby School's) tradition of theft.

Example of the idiomatic use of cup in the phrase “one’s cups runneth over”: Model Adriana Fenice (b 1994) in 32G (10G or anything between 70-82G in some markets) bra.

The verb use “to cup” was a part of pre-modern medicine by the fourteenth century, describing the use of something cup-like to press against the skin to draw blood closer to the surface prior to “slow blood-letting”.  Medical dictionaries note there were two modes of cupping: one in which the part is scarified and some blood taken away to relieve congestion or inflammation of internal parts (“wet cupping”, or simply “cupping”), the other in which there was no scarification no blood was abstracted (“dry cupping”).  The concept (as “cupping” and without the bleeding) is still used in certain beauty treatments popular in East-Asia.  The cupful (quantity; that a cup holds, contents of a cup) was known in late Old English and persists to this day, the phrase “cup runneth over” is used to refer an over-supply of anything and was from the Hebrew Bible (Psalms:23:5) where the message was “I have more than enough for my needs” and thus a caution against greed, or in the words of Johann Sebastian Bach (1685–1750): Ich habe genug (I have enough) an unfashionable view in a materialist age although one with which Ms Fenice might concur.  Modifiers are appended as required, hyphenated and not including the teacup (circa 1700), the egg-cup (used for making the eating of boiled eggs easier (1773)) and the cupcake (1828).  Cupcakes were “small cakes intended for one” and were an invention of US English, the name derived either from cup-shaped containers in which they were baked or from the small measures of ingredients used.  The slang use to describe an “attractive young woman” was another American innovation from the 1930s.

Art Deco and the tea cup: 1934 "Tango" trio by Royal Doulton in bone china, the cup with the classic pointed handle.

The use of “cup” in recipes is probably one of the less helpful uses of the word and for those not familiar with the conventions, they were probably baffled and wondering which of the various sized cups they had should be used.  The origin of “cup” as a measure lies in the old English unit which was ½ an imperial pint and thus (10 imperial ounces (284 ml), often later rounded to 300 ml.  Elsewhere, countries did their own thing: In Australia & New Zealand it was set at 250 ml after the conversion to metric measurements in 1973; In the US it was a liquid measure equal to 8 fluid ounces (237 ml which was usually rounded to 240); In Canada it was set at 8 imperial ounces (227 ml and rounded to 250).  The “metric cup” is now a universal 250 ml and for recipes this appears to be the preferred use even in North America.

Bra cups

Example of the idiomatic use of cup in the phrase "storm in a D Cup": Lindsay Lohan in demi-cup bra, from a photoshoot by Terry Richardson (b 1965) for Love magazine, 2012.

If in cooking "cup" has been (just about) standardized around the world, the bra cup, that other use of cup as an expression of volume is bafflingly diverse, anomalies appearing even within a manufacturer's catalogue.  The use of cup in the bra business seems to have begun in the 1930s although among historians of the bra (a surprisingly well populated niche in the discipline of the history of fashion) many differ in detail; the vague consensus seems to be the term was first used in this context in the early 1930s, was wide-spread by 1940 and almost universal by the early 1950s.  The principle of the cup size was compelling simple in that there were two variables (1) the torso and (2) the breasts.  The measurement of the torso was expressed by the bra band size (measured under the bust) in inches (or its metric equivalent) such as 30”, 32”, 34” etc, the graduations between the numbers handled by the fastening mechanism (usually a hook & eye arrangement) allowing a “tight” or “loose” fit so a 32” band could be worn by someone with a torso measurement in a 31-33 inch range.  The cup size range corresponded with the volume of the breast and (in ascending order) these were expressed in letters: A, B, C, D etc so when combined, the products were called 32B, 34C etc.  In theory, the two values worked progressively (up & down: alphabetically & numerically) so the cup size of a 32C was the same as a 30D and a 34B; in the industry, the concept is called "sister sizes", each cup the same dimensions but mounted on a different sized structure (defined by the back-band) and labelled accordingly.  That's the theory and within a manufacturer's single range it may often be true but there is no recognized definition for cup sizes so not only are any two 32Cs from different manufacturers likely to be a slightly different size, nor can it be expected the dimensions of the cup of any 30D will align exactly with that of any other 34B.  It may but it can't be predicted and the expectation should be it will likely "tend towards".

English borrowed the word brassiere from the French brassière, from the Old French braciere (which was originally a lining fitted inside armor which protected the arm, only later becoming a garment), from the Old French brace (arm) although by then it described a chemise (a kind of undershirt) but in the US, brassiere was used from 1893 when the first bras were advertised and from there, use spread.  The three syllables were just too much to survive the onslaught of modernity and the truncated “bra” soon prevailed, being the standard form throughout the English-speaking world by the early 1930s.  Curiously, in French, a bra is a soutien-gorge which translates literally and rather un-romantically as "throat-supporter" although "chest uplifter" is a better translation.  The etymological origin of the modern "bra" lying in a single garment is the reason one buys "a bra" in the same department store from which one might purchase "a pair" of sunglasses or trousers, both of which, centuries ago, began as two separate items.     

Bra size multi-national conversion chart by Fredericks of Hollywood.  Like the footwear business, it seems an industry crying out for an ISO (International Organization for Standardization) but while something buyers might welcome, it seems unlikely industry would share the enthusiasm.  Sizing systems for shoes and bras evolved independently in different regions, based either on local traditions and preferences or just wholly arbitrary choice and there would be much commercial resistance to having to change long-established conventions, something which would necessitate updating labels, packaging & advertising, as well as re-educating initially baffled consumers.  Obviously, that would be costly and therefore lobbied against.  ISO 19407:2015 does provide guidelines for converting shoe sizes between regions but that’s more an acknowledgement of a problem (and a “sort-of”) work-around than a solution and the ISO seems never to have contemplated bras.  Probably, the only way such ISOs could successfully be imposed would be to give industry a long lead-time (perhaps 25-30 years) to permit an orderly and phased world-wide introduction but realistically, few are expecting progress.

Unfortunately the manufacturers complicated things in a number of ways.  Given the A,B,C,D ascending sequence, it would have been reasonable to assume E,F,G & H would follow and in some cases they did but not all, some adopting a double letter convention yielding DD, EE etc but these did not represent fractional sizing-steps between single letters; what was to some manufacturers a DD was an E to others and some were so taken with the idea they added triple lettered sizes so a 32DDD was nominally the equivalent of a 32F from another house.  Some quirks were understandable such as the one which explains the rarity of the I cup, the explanation being the character might be confused with a numeric "1" which, given the syntax of the system, seems improbable but one can see their point.  Although there are a few "I cup" bras, most manufacturers skip the letter and either leave a nominal gap between the "H" & "J" cups or include a "HH" cup in the range.  It's only the descriptions where there's a lacuna, the actual cup sizes on offer still graduated although it can be mystifying because, between manufacturers, the same size can actually be tagged as "H", "I", "HH", "J" or even "GGG" and while that can make in-store shopping merely time-consuming, for on-line shoppers it makes life especially difficult.  

1962 Chrysler 300H (left) and 1963 Chrysler 300J (right).

Chrysler in the US, not wanting the market to think there was a "3001", was in 1963 guided by the same rationale when for the first time since 1956 a letter was skipped in the designation of the 300 “letter series” cars; there’s nothing to suggest the corporation ever pondered a “300HH”.

The BUFF: The new version of the Boeing B-52 Stratofortress (replacing the B-52H) will be the B-52J, not B-52I or B-52HH.   

The US Air Force also opted to skip “I” when allocating a designation for the updated version of the Boeing B-52 Stratofortress (1952-1962 and still in service).  Between the first test flight of the B-52A in 1954 and the B-52H entering service in 1962, the designations B-52B, B-52C, B-52D, B-52E, B-52F & B-52G sequentially had been used but after flirting with whether to use B52J as an interim designation (reflecting the installation of enhanced electronic warfare systems) before finalizing the series as the B-52K after new engines were fitted, in 2024 the USAF announced the new line would be the B-52J and only a temporary internal code would distinguish those not yet re-powered.  Again, the “I” was not used so nobody would think there was a B-521.  Although the avionics, digital displays and ability to carry Hypersonic Attack Cruise Missile (HACM, a scramjet-powered weapon capable exceeding Mach 5) are the most significant changes for the B-52J, visually, it will be the replacement of the old Pratt & Whitney TF33 engines with new Rolls-Royce F130 units which will be most obvious, the F130 promising improvements in fuel efficiency of some 30% as well as reduction in noise and exhaust emissions.  Already in service for 70 years, apparently no retirement date for the B-52 has yet been pencilled-in.  In USAF (US Air Force) slang, the B-52 is the BUFF (the acronym for big ugly fat fellow or big ugly fat fucker depending on who is asking).  From BUFF was derived the companion acronym for the LTV A-7 Corsair II (1965-1984, the last in active service retired in 2014) which was SLUFF (Short Little Ugly Fat Fellow or Short Little Ugly Fat Fucker).

Under the A-B-C-D etc cup-sizing system, a given designation varies in dimensions (and thus volumetric capacity) according to the band size, the cup of a 28A smaller than that of a 32A (which should share size and shape with that used on a 30B).   

The theory: Individual results may vary.

Then there was the band size.  Most countries of course use the metric system so dimensions had to be converted but the convention for those advertised in inches was to use increments of 2 (28, 30, 32 etc) while for metric users it was in jumps of 5 cm (70, 75, 80 etc) which is close but not quite the same (28” = 71.12 cm; 30” = 76.2 cm; 32 = 82.28 cm).  More of a problem was that for the system to work, some math was required because the number from the under-bust measurement didn’t directly translate to the advertised bra size: What the buyer had to do was take the number and add 5 inches (12.7 cm) so if one’s under-bust measurement was 29” (73.7 cm), one (at least in theory) needed something with a 34” band (86.4 cm, the closest in the metric countries being the 85 cm range).  However, if the number was over 33” (83.8 cm), then one added only 3” (7.6 cm).  At that point, one needed to determine the appropriate cup.  This required a further measurement, one taken which represented the bust at its fullest projection, the somewhat misleadingly named “over-bust” number which was actually taken following the nipple line.  Many recommended taking it while wearing a bra but if that was a poor fit, that would hardly be helpful and the ideal method turned out to be (and usually this was necessary only if the volume was above a certain point) holding the breasts in place at the desired location while another did the measuring.  An ideal project then in which to involve one’s boyfriend or girlfriend, the only instructions needed being (1) the tape should rest lightly on the skin and (2) it should straight across the back, parallel to the floor.  The relationship between the over-bust measurement and the band size indicated the needed cup size: if the difference is 1” (2.54 cm) then it dictates an A cup; 2” (5.08 cm) and it’s a B cup and so on.  In many cases the simple under/over equation will work but not in all and some authorities have added additional measurements to be taken while in different positions, the 6 listed including lying flat on one's back and leaning forward so the breasts are perpendicular to the ground.  Definitely, the more dimensions which are taken, the more this seems a job for two.  

The math of cup sizes.

In practice it transpired the human body wasn’t so accommodating of production line rationalization but the system worked well enough for it to have endured for decades although only a percentage of women find an ideal fit without the help of an in-store fitter.  Quite what that number is depends on who is asked but it’s clear it’s a long way short of 100%.  The outcome for bra wearers wasn’t helped by the lack of standardization in either the labeling or the technical specification of the cup size.  The inches vs centimetres thing was manageable but even in some countries which had long switched to the metric system, bras sizes were often expressed in inches (a similar aberration to the (almost) universal use of inches for certain products including the wheels used on cars and computer monitors) and because of the internationalized nature of the market with so much imported product, in many countries, both sizing regimes simultaneously were on sale, often in the same shop.  Helpfully, many displayed wall charts with conversion tables.  For some reason, in Australia and New Zealand, the decision was taken to use the dress sizing standard used in the antipodes (8 = 30”, 10 = 32” etc), thus bra sizes like 8C, 10D etc which local users presumably adapted to but it seems a needless complication.  Additionally, regardless of what country one was in, there was no guarantee a given size from one manufacturer would exactly align with that from another and in England, a comparison by a consumer organization revealed band and cup size differences existed in stated sizes even between various styles produced by the same manufacturer; not all 32Ds were created equal.  Given that, it seems obvious it’s best to seek the assistance of a fitter but in the internet age, customers found capitalism offered a handy on-line, home delivered alternative, the trick being to order half a dozen bras of slightly different declared sizes (eg 32C, 30D, 32E etc), the ones not quite right being able to returned for credit at no cost, the site paying all the P&H (postage & handling).  That approach has attracted much criticism because of the environmental impact and it’s a significant cost to the distributor and some have now moved to restrict the practice.

Details of fifteenth century bras in Linen from Austria.

Although it wasn’t until well into the twentieth century the idea of cup sized was codified (though to this day not standardized), the concept turned out to be ancient, something confirmed in 2008 when, as part of her PhD research, Austrian anthropologist Beatrix Nutz was undertaking at the University of Innsbruck in Austria, retrieved from the dirt, wood and straw (all discarded stuff apparent used as insulation) of centuries ago in the foundations of an Austrian castle, four linen bras among some 4000 textile fragments.  What was striking was the medieval garment was the similarity to the version first patented in the United States in 1914 something perhaps unsurprising as there really is only one way to achieve the functional effect desired if a minimalist approach is pursued and that’s what was done, a few centuries apart.

Fifteenth century "longline" bra in Linen from Austria, the midriff-enveloping fabric originally extending beneath the cups.

The detailing on the garments would be familiar to those bra shopping in the twenty-first century, the lower ends decorated with finger-loop-laces, sown on with lace-stitches, resulting some simple needle-lace decoration.  There’s structural overlap too, one of the unearthed bras in the style of the “longline” bras which first became popular in the 1930s, both representing the practical expedient of combining a type of corset with a bra.  Clearly, while not necessarily something with wide commercial availability, garments in the style of the linen bras must have been well-known (at least in certain circles because in French texts as early as 1315 CE there are mentions of the “breast bags” or “shirts with bags” women used to support and restrain their breasts and one disapproving author called them “indecent” although it seems his objection was to “breasts too large” rather than the pre-modern lingerie used to minimize their appearance and the longest known surviving fragment in this vein is a verse from fifteenth century Vienna:

Ir manche macht zwen tuttenseck
Damit so snurt sie umb die eck,
Das sie anschau ein ieder knab,
Wie sie hübsche tütlein hab;
Aber welcher sie zu groß sein,
Die macht enge secklein,
Das man icht sag in der stat,
Das sie so groß tutten hab.

Translation:

Many a woman makes two bags for the breasts,
with them she roams the streets,
so that all the guys look at her,
and see what beautiful breasts she has got;
But whose breasts are too large,
makes tight pouches,
so it is not told in the city
that she has such big breasts.

Nursing bras use specialized cups: Lindsay Lohan inspects the apparatus in Labor Pains (2009).

The most obvious specialized cup is that used with nursing bras which feature an arrangement whereby most of the cup’s fabric can be semi-separated from the superstructure, enabling breast-feeding without the need to remove the whole garment.  Among bra manufacturers, there are different implementations by which the functionality of a nursing bra's apparatus is achieved and presumably chest-feeders (the preferred term among the woke to describe those who used to be called “breast-feeding women”) choose whichever best suits them; it may simply be that for manufacturers the production-line rationalization achieved by being able to adapt the specialized cups to the structures used for conventional bras is compelling, dictating the designs.  Which chest-feeders choose is of some significance given how often heard is the complaint the process is “tiring”.  To those who will never be chest-feeders it sounds more a pleasant and diverting relaxation rather than anything tiring but they all say it so it must be true.

The "push-up" bra (the best-known of which is the "Wonderbra") lives up to its name by using strategically placed padding which has the effect of "pushing up" the breast tissue (it has nowhere else to go), creating the visual effect of something bigger and higher.  Most padding is purely functional but there are also novelty items such as the one above which is variant of the "hand bra", also a thing.  

The cupless: A "special purpose" bra available in S, M, L & XL.

Other variations include the demi-cup (also called the half-cup ("semi-cup" not a recognized term)), the bullet cup, the adhesive cup (an enlarged & shaped adaptation of the so-called "tit-tape" technology), the padded cup and the seemingly paradoxical cupless (or open-cup), the last a niche market.  Those wanting to have "their cake and eat it too" who like to go braless while enjoying the benefit of some support can buy clothes with a "built-in bra" or a "shelf-bra" although the law of physics continue to operate and beyond a certain size (and more to the point: weight), these things simply: "don't work".  The cups of a "push-up bra" include thick padding towards the bottom of the structure, this having the effect of "pushing up" the breast tissue, lending things a higher, fuller look.  There are degrees to which this can be implemented: the more the padding, the greater the effect.

Vaquera’s crew neck T-shirt with trompe l'oeil underwear.  Despite the model’s expression (it’s part of their training for the catwalks), the look really should be worn for fun.  The skin-tone of the legs is because of tights, not Photoshopping.

Bra cups can even be virtualized.  The technique called Trompe-l'œil (from the French and literally “trick the eye” describes an optical illusion created by rendering on a two-dimensional surface something which appears as a three-dimensional object and the trick had been around for millennia when first the term was used in 1800 by French artist Louis-Léopold Boilly (1761-1845) for a painting he exhibited in the Paris Salon.  While it wasn’t for a few decades trompe-l'œil (usually in English as trompe l'oeil) was accepted by the academy as a legitimate part of high-art, architects and interior decorators continued to exploit the possibilities and the term entered their lexicons.  It has of course for years also been used in the prints on T-shirts but of late this has extended to depictions of underwear.  For most of the twentieth century, the sight of an exposed bra strap was a social faux pas, Vogue and other dictators of fashion publishing helpful tips recommending (for the well-organized) sewing on Velcro strips and (for everyone else) the industry’s DLR (device of last resort): the safety pin.  By the 1980s things had changed and the bra emerged as a fashion piece which might in part (or even in whole) be displayed.  It’s a look which waxes and wanes in popularity but one which has never gone away although it’s one of those things where ageism remains acceptable: beyond a certain age, it shouldn’t be used.  Now, fashion houses are promoting trompe l'oeil bras, knickers and other underwear printed on T-shirts, one attraction being it’s possible to create depictions of garments with an intricacy and delicacy not possible IRL (in real life).

A mastectomy bra with prostheses (left) and with the prostheses inserted in the cups' pockets (centre & right).

There are also bras for those who have lost a breast, the cups of which are “double-skinned” in that they feature internal “pockets” into which a prosthetic breast form (a prosthesis) can be inserted.  Those who have had a unilateral (or single) mastectomy (the surgical amputation of one breast) can choose a cup size to match the remaining while those who have lost both (a bilateral or double mastectomy) can adopt whatever size they prefer.  There are now even single cup bras for those who have lost one breast but opt not to use a prosthetic, an approach which reflects both an aesthetic choice and a reaction against what is described in the US as the “medical-industrial complex”, the point being that women who have undergone a mastectomy should not be subject to pressure either to use a prosthetic or agree to surgical reconstruction (a lucrative procedure for the industry).  This has now emerged as a form of advocacy called the “going flat” movement which has a focus not only on available fashions but also the need for a protocol under which, if women request an AFC (aesthetic flat closure, a surgical closure (sewing up) in which the “surplus” skin (often preserved to accommodate a future reconstructive procedure) is removed and the chest rendered essentially “flat” ), that is what must be provided.  The medical industry has argued the AFC can preclude a satisfactory cosmetic outcome in reconstruction if a woman “changes her mind”  but the movement insists it's an example of how the “informed consent” of women is not being respected.  Essentially, what the movement seems to be arguing is the request for an AFC should be understood as an example of the legal principle of VAR (voluntary assumption of risk).  The attitude of surgeons who decline to perform an AFC is described by the movement as the “flat refusal”.

Slant

Slant (pronounced slant or slahnt)

(1) A surface, structure, line etc at a slope or in an oblique direction.

(2) In (US) football, an offensive play in which the ball-carrier runs toward the line of scrimmage at an angle (known also as the “slant-in”, a pass pattern in which a receiver cuts diagonally across the middle of the field).

(3) In prosody, as “slant rhyme”, a synonym for the “half rhyme”, “near rhyme” & “quasi-rhyme” (a form of imperfect rhyme in which the final (coda) consonants of stressed syllables (and, in modern English poetry, any following syllables to the end of the words) are identical in sound, but the vowels of the stressed syllables are not.

(4) In typography, a synonym of slash ( / ⟩, particularly in its use to set off pronunciations from other text (not used in IT where the distinctions are between the forward-slash (/) and the back-slash (\) which nerds call respectively the slash and the slosh.

(5) In biology, a sloping surface in a culture medium.

(6) In hydro-carbon extraction, as “slant drilling”, a technique in which the drilling is undertaken at an oblique angle rather than the traditional vertical orientation.

(7) In extractive mining, as type of run in which a heading is driven diagonally between the dip and strike of a coal seam.

(8) In informal use, a glance or look.

(9) To veer or angle away from a given level or line, especially from a horizontal; slope (in to incline, to lean).

(10) Figuratively, to have or be influenced by a subjective point of view, bias, personal feeling or inclination etc (often as “slant towards”, “slanted view” etc); a mental leaning, bias, or distortion (“feminist slant”, “MAGA slant”, “liberal slant”, “business slant” et al).

(11) To cause to slope.

(12) Figuratively, to distort information by rendering it unfaithfully or incompletely, especially in order to reflect a particular viewpoint (more generously sometimes described as “spin” or “massaged”).  The concept is known also as “angle journalism” (the particular mood or vein in which something is written, edited, or published).  In Scots English, the meaning “to lie or exaggerate” captures the flavor.  When used to describe the composing, editing, or publishing of something to attract the interest of a specific sub-group (a “slanted” story), “slanted towards” is necessarily pejorative if used only to suggest something optimized to appeal to a certain market segment or demographic (ie it’s more like “aimed at” or “intended for”).

(13) In slang, as “slant eye” (a racial slur now listed as disparaging & offensive), a reference to people from the Far East (applied historically mostly to the Chinese & Japanese), based on the shape of the eyes.  The variants included “slit eye”, “slitty-eyed” & “slopehead”, all equally offensive and now proscribed.

(14) In painting (art) a pan with a sloped bottom used for holding paintbrushes; a depression on a palette with a sloping bottom for holding and mixing watercolors; a palette or similar container with slants or sloping depressions.

(15) In US regional slang, a sarcastic remark; shade, an indirect mocking insult (archaic).

(16) In US slang, an opportunity, particularly to go somewhere (now rare).

(17) In historic Australian colonial slang, a crime committed for the purpose of being apprehended and transported to a major settlement.

Circa 1480s: From the Middle English –slonte or -slonte, both aphetic (in phonetics, linguistics & prosody, “of, relating to, or formed by aphesis” (the loss of the initial unstressed vowel of a word)) variants of aslant, thought to be of Scandinavian origin.  The other influence was probably the earlier dialectical slent, from the Old Norse or another North Germanic source and cognate with the Old Norse slent, the Swedish slinta (to slip) and the Norwegian slenta (to fall on the side), from the Proto-Germanic slintaną (which, in turn, was probably in some way linked with aslant.  Slant & slanting are nouns, verbs & adjectives, slanted is a verb & adjective, slantish is an adjective, slantwise is an adjective & adverb and slantingly & slantly are adverbs; the noun plural is slants.  The pleasing adjective slantendicular is listed by some as non-standard and presumably is proscribed in geometry and mathematics because it's an oxymoron; it’s a portmanteau word, the construct being slant + (perp)endicular.  It may be useful however in commerce or engineering where it might be used to describe something like a tool with a shaft which at some point assumes an oblique or skewed angle.   So it’s there to be used and slantindicular should be applied to stuff which is neither wholly nor fully slanted and in architecture, such structures are numerous.  In commerce, it could be used as a noun.

The noun slant by the 1650s was used to mean “an oblique direction or plane” and began in geography & civil engineering (of landforms, notably ski-slopes), developed from the verb or its adjective.  The now familiar (in the Fox News sense) meaning “way of regarding something, a mental bias” dates from 1905 while the derogatory slang sense of “a person of Asian appearance” came into use some time in the 1940s, a direct descendent from the earlier "slant-eyes", documented since 1929.  The verb slant is documented since the 1520s in the sense of “obliquely to strike (against something)”, an alteration the late thirteenth century slenten (slip sideways), the origin of which is murky but etymologists have concluded it came (via a Scandinavian source (noting the Swedish slinta (to slip)) and the Norwegian slenta (to fall on one side), from the Proto-Germanic slintanan.  The intransitive sense of “to slope, to lie obliquely” was in use by the 1690s, while the transitive sense of “to give a sloping direction to” had emerged by the early nineteenth century.  As early as the late fifteenth century forms were in use as an adverb, the adjectival use attested from the 1610s.  The technical use in literary theory as “poetic slant rhyme” was first used in the mid 1920s (assonance or consonance) although such lines had appeared for centuries, used sometimes deliberately as a device, sometimes not.  In the following stanza by English poet Peter Redgrove (The Archaeologist, published in Dr Faust's Sea-Spiral Spirit (1972)), the second and third lines contain a form of slant rhyme while the first and fourth have pure rhymes:

So I take one of those thin plates
And fit it to a knuckled other,
Carefully, for it trembles on the edge of powder,
Restore the jaw and find the fangs their mates.

Slanted right: You are watching Fox.

While it’s unlikely volumes of the poetry of Emily Dickinson (1830–1886) sit upon the bookshelves of those members of the Fox News audience who have bookshelves, they likely would concur with her words: “Tell the truth but tell it slant.”  “Slanted reporting” has become something which in recent years has attracted much attention (and much hand-wringing by the usual suspects) as an increasingly polarization of positions has been alleged to be a feature of political discourse in the West.  There is little doubt the effect (as reported) is obvious but there’s some debate about both the mechanics and the implications of the phenomenon.  As long ago as 2018, a study found that although the tenor and volume of things on X (formerly known as Twitter) was found to be increasingly toxic and surging, the number of active users engaged in these political polemics was found to be tiny and their effect was distorted by (1) the huge number of tweets they tended to post, (2) the propensity of their fellow-travelers to re-tweet and (3) the use of bots which were more prolific still.  If anything, recent voting patterns suggest it would seem the views of the general population appear to be trending away from the extremes towards the more centralist positions offered by independents or small-parties, something most obvious in Australia where compulsory voting exists.  Outfits like Fox News offer a slanted take on just about everything (and promote country & western music which truly is inexcusable) but this is something which has been identifiable in the news media as long as it’s existed and their blatant bias is hardly subversive or threatening, simply because it is so blatant.  What was most interesting in what emerged from the recent defamation suit filed by Dominion Voting Systems against Fox News suggested the network’s stance on things was motivated more by the financial imperative than ideological purity.  Intriguingly, what some analysts concluded was that if the universe shifted and the Fox News audience transformed into a bunch of seed-eating hippies, there would follow Fox’s editorial position, the slant being towards the advertising revenue rather than a particular world view.  Of course, there are some slants which are unalterable and dictated by ideological purity but with commercial media, it’s likely sometimes cause is confused with effect.

The Leaning Tower of Pisa (left) and Lindsay Lohan in The Parent Trap (1998) in front of London’s perpendicular Big Ben (1859) (right).  The architect’s original name for the latter was a typically succinct “Clock Tower”, chosen because it housed the “Great Bell of the Great Clock of Westminster” but it was in 2012 renamed “Elizabeth Tower”, marking the Diamond Jubilee of Elizabeth II (1926-2022; Queen of the UK and other places, 1952-2022), something little noted by Londoners or those beyond who continue to prefer the nickname “Big Ben” although strictly speaking that’s a reference only to the “Great Bell” a 13.5 ton (13.7 tonne) casting in bell metal (a bronze which is an alloy of about 77% copper & 23% tin).  The origin of the nickname is contested but there are no romantic tales, all the possible inspirations being worthy white men as was the Victorian way.

Although in Italy alone there are seven leaning towers (three of which stand (ie lean) in Venice), it’s the torre di Pisa (Tower of Pisa) which is by far the best-known and a frequent Instagram prop.  Built between 1173-1372, the structure in the Piazza del Duomo (Pisa’s Cathedral Square) is the campanile (the freestanding bell tower) of the adjacent Pisa Cathedral and the famous lean of some 4^o (actually somewhat less than its greatest extent after more than a century of compensating engineering works) was apparent even during construction, the cause the softness of the sub-surface.  That geological feature has however contributed to the tower’s survival, the “rubber-like” sponginess below acting to absorb movement and despite a number of severe earthquakes in the region over the centuries, the tower remains.  It is of course known as the leaning tower than a sloping, oblique or slanted tower, probably because of the conventions of use which evolved in English.

The words “sloping”, “oblique”, “slanted”, & “leaning” all describe something not vertical or horizontal there tend to be nuances which dictate the choice of which to use.  Sloping generally is used of something which inclines or declines at a gentle or continuous angle, the implication being of a gradual or smooth transition from elevation to another, such as the way a hillside rises gradually rises to its summit.  Oblique is mostly a matter of specific angles and is thus common is mathematics, geometry and engineering.  Again, it’s a reference to something neither parallel nor perpendicular to a baseline but it tends to be restricted to something which can be defined with an exact measurement; in geometric or technical use, an oblique line or angle is one neither 90^o nor perfectly horizontal.  Slanted describes something positioned at a diagonal, often used to imply a more noticeable or sharp angle but also is widely used figuratively, metaphorically and in idiomatic phrases.  Leaning refers to something tilted or positioned at an angle due to external pressure, the object in an unstable position and in need of support.  The implication carried is that something which “slants” is designed thus to do while something which “leans” does so because of some design flaw or unexpected external force being applied so it’s the leaning and not the sloping tower of Pisa, even though the structure has assumed quite a slope.

Slanting Engines

On a slant: Diagram of the mounting of the M194 straight-six engine in the Le Mans winning Mercedes-Benz 300 SL (W194) canted at a 40^o slant (left); the Mercedes-Benz M196 straight-eight engine schematic (centre) and installed in a 1954 W196R "Streamliner" at a 53^o slant (right).  The two large donut-like objects at the front are the inboard, finned brake drums; at the time, the engineers maintained disk brakes were "not yet ready for use". 

There are “slant” engines and they exist in three configurations.  The first is simply a conventional in-line engine (straight-six, straight-eight etc) which, when installed in a vehicle, is fitted with the block canted to the left or right, the objective being a lower hood line which means a better aerodynamic outcome.  A classic example was the Mercedes-Benz W196R Formula One racing car (1954-1955) in which the straight-eight was canted to the right at a 53^o angle, the technique carried over when the same structure was used to produce the W196S (1955) used to contest the World Sports Car Championship.  Rather opportunistically, the W196S was dubbed the 300 SLR (one of which in 2022 became the world's most expensive used car, selling at a private auction for US$142 million) as a form of cross promotion with the 300 SL (W198, 1954-1956) Gullwing then in production, even though the two types shared little more than nuts, bolts and a resemblance.  The 300 SL did however also have its straight-six engine sitting at a slant, this time canted at a 50^o angle and although the factory never published an estimate of the reduction in drag, it’s long been presumed to be “at least several percent”.  Another advantage of the configuration was it made possible the use of “long-tube” runners for the induction system, taking advantage of the properties of fluid dynamics to permit them to be tuned either for mid-range torque or top-end power.  The concept used math which had been worked out in the nineteenth century and had often been used in competition but it wasn’t until 1959 when Chrysler in the US released their picturesque induction castings that the system, imaginatively named the “Sonoramic”, reached a wider audience.

Chrysler Slant Six (170 cid, 1963) schematic.

The “true” slant engines were those with a slanted block atop an otherwise conventional arrangement of components, the best known of which was Chrysler’s long-serving “Slant Six”, produced in displacements of 170 cubic inch (2.8 litre, 1959-1969), 198 cubic inch (3.2 litre, 1970-1974) and 225 cubic inch (3.7 litre, 1960-2000).  The block of the Slant Six was canted to the right at a 30^o and like Mercedes-Benz, Chrysler took advantage of the space created to the left to produce some wide induction runners, the most extravagant those used by the special Hyper Pack option package which used a four barrel carburetor, enabling the engine to produce power which made it competitive with many V8 powered machines.  Although the name “Slant Six” became famous, it was only in the mid-sixties it caught on, Plymouth originally calling the thing a 30-D (a reference to the a 30^o slant), hardly very catchy and something to which only engineers would relate and Slant Six was soon preferred although the aficionados really like “tower of power” and the engine even today still has a devoted following.

Chrysler Slant Six with Hyper Pak in 1962 Plymouth Valiant V-200.

Chrysler didn’t restrict the Sonoramics to the big-block V8s, using it also on the short-lived (1960-1962) Hyper Pak performance option for the both 170 cubic inch (2.8 litre, 1959-1969) and 225 cubic inch (3.7 litre, 1987-2000) versions of the Slant Six, the engineers taking advantage of the space afforded by the canted block to permit the curvaceous intake runners nearly to fill the engine bay.  The Hyper Pak wasn't seen in showrooms but was available as an over-the-counter kit (literally a cardboard box containing all necessary parts) from Dodge & Plymouth spare parts departments and its life was limited because it became a victim of its own success.  Although less suitable for street use because it turned the mild-mannered straight-six into something at its best at full throttle, in the race events for which it was eligible it proved unbeatable, dominating the competition for two years, compelling the sanctioning body cancel the series.

Manifold porn: The Slant Six's angle meant there was much space available to the left and a range of intake manifolds followed, some of which remain available to this day.  Using variations of the sonoramic tuning, manifolds were produced for single, two & four barrel carburetors and between 1965-1968, Chrysler's Argentine operation produced the Slant Six in a version with twin single barrel carburetors.  The use of the properties of fluid dynamics to gain power or torque as desired quickly was adopted by the industry as an engineering orthodoxy.

Some myths seem to have become attached to the Hyper-Pak.  What seems to be true is the original kit, sold in 1960 for the 170 engines used in competition, was a genuine homologation exercise and as well as the intake manifold & Carter AFB four barrel carburetor, it included all the internal parts such as the high-compression pistons, the high-lift camshaft and the valve train components needed to support the consequently higher engine speeds.  Because the competition rules allowed modifications to the exhaust system, on the track the cars ran tubular steel headers which fed an open exhaust, terminating in the racers' preferred “dump pipe”.  After the requisite number of “complete” kits were sold, thus fulfilling the homologation demands, the kits were reconfigured and included only the “bolt-on” parts such as the induction system and a camshaft which, while more aggressive than the standard unit, wasn’t as radical as the one used on the track but could be used in conjunction with the standard valve train and Chrysler’s TorqueFlite automatic, thus expanding the Hyper-Pak’s appeal.

At the same time, the availability was extended to the larger 225 which between 1961-1963 was also available with an aluminum block, thus becoming one of the small number of engines configured with the combination of an aluminum block with a cast-iron head.  US manufacturers were at the time aware the trend was for cars to continue getting bigger so they were interested in ways to reduce weight.  However, despite saving some 70 lbs (32 KG), Chrysler’s aluminum block was, like General Motors’ (GM) 215 cubic inch (3.5 litre) V8, short-lived (though the V8 after being sold to Rover enjoyed a long, lucrative and prolific second life, not finally laid to rest until 2006) for not only were teething troubles encountered with the still novel method of construction, the accountants made clear using cast iron was always going to be cheaper so the industry just accepted weight gain and whenever required, increased displacement to compensate, an approach which persisted until the first oil shock of the early 1970s.

1970 Dodge Challenger (1970-1974) with 225 Slant Six.

Until 1973, both the Challenger & the corporation's companion E-Body pony car (the Plymouth Barracuda (1969-1974)) was available with the Slant Six (198 & 225) although the fitment rate was under 10%, unlike the early pony cars (Ford Mustang, Chevrolet Camaro and the early Barracudas) where the six-cylinder versions would at times be close to 40% of production.  Many of the surviving Slant Six Challengers & Barracudas have been "re-purposed" as clones of the more desirable versions with potent small or big-block V8s.  Because of the rarity, exceptional examples of slant-six E-body cars do trade in a niche in the collector market. 

Although it was the longer lived 225 version which gained the Slant Six its stellar reputation for durability and the ease with which additional power could be extracted, there's always been a following for the short-stroke 170 because of its European-like willingness to rev, the characteristics of the over-square engine (unique among the slant-six's three displacements (170-198-225)) unusually lively for a US straight-six.  Despite some aspects of the specification being modest (there were only four main bearings although they were the beefy units used in the 426 cubic inch Street Hemi V8), for much of its life it used a tough forged steel crankshaft and high-speed tolerant solid valve lifters; it proved a famously robust engine and one remarkably tolerant of neglect.  Despite that, after the Hyper Pak affair, Chrysler in the US showed little interest in any performance potential, knowing the US preference for V8s, something which doomed also Pontiac's short-lived single overhead camshaft (SOHC) straight-six (1966-1969).  A version of the 225 with a two-barrel carburetor (rated at 160 horsepower, an increase of 15 over the standard unit) was offered in some non-North American markets where V8 sales were not dominant and it proved very popular in South Africa, Australia, New Zealand and Central & South America but only when tighter US emission regulations forced its adoption did a 225 with a two barrel carburetor appear in the home market though there it was installed to restore the power losses suffered after the emission control plumbing was added rather than seek gains.

Pontiac Trophy 4 cutaway.

Making a straight-eight or V8 by combining two in-line fours has been done a few times and many have been successful (although Triumph managed to create a truly horrid one for the otherwise lovely Stag).  Less common is making a four from an eight but that’s what Pontiac did when they conjured their 194.5 cubic inch (3.2 litre) four by using one bank of their 389 cubic inch (6.4 litre) Trophy V8 and it was (just about) literally cut in half, meaning the cylinders were canted to the right by 45^o (the V8 obviously in a conventional 90^o configuration).  To emphasize the family connection with the highly regarded Pontiac Trophy V8, the smaller offspring was called the Trophy 4 (although it was at time also dubbed the Indy 4 or Indianapolis 4 which even at the time sounded ambitious).  It did work and the economic advantages for the manufacturer (use of common components and the same assembly line) were compelling but the limitations inherent in a four-cylinder of such a large displacement were apparent in the rough-running and wear on critical parts and it was available only between 1961-1963 and used in a single model, the compact (in US terms) Tempest.

Pontiac 389 cubic inch V8 and "Tri-Power" (three Rochester two-barrel carburetors) induction in 1966 GTO convertible; one of these is more sought after than two Trophy 4s and worth more than twice as much.

The Pontiac V8 which provided the bones for the Trophy 4 was unusual compared with the US industry's post-war practice in that although its displacement ranged between 265-455 cubic inches (4.3-7.5 litres), only one block was used whereas others would produce several, the most common distinction being the "big block" and "small block", terms which were not always indicative of relative internal capacity but were literal in terms of external dimensions.  Ford muddied the waters a bit when one "big block" was continued in production after another (even bigger) "big block" was released and this had led some to prefer the opportunistically coined "mid block" but that's always been too nerdy for most who continue to prefer the well-understood small-big distinction.  All Oldsmobile's post-war V8s also shared the one basic block but the division followed the usual practice of using a "tall deck" version (ie one with metal added to the casting to permit a longer stroke) for the larger displacement iterations whereas Pontiac chose to use a unique "short deck" casting for some in the last days before General Motors (GM) extended the intra-divisional sharing of engines, something which doomed the Pontiac V8.  The fact that the external dimensions of the Pontiac V8s were almost all identical, regardless of displacement intrigued some who saw a simple, cheap path to power, replacing a 326 cubic inch (5.3 litre) V8 with a 455 cubic inch version a remarkably simple process.  However, as some soon found out, just because it fitted under the hood didn't mean other components would tolerate the increase in power and torque, something which applied especially to some of Pontiac's novel (and short-lived) engineering in the early 1960s such as the flexible driveshaft (the so-called "rope-drive") or the rear-mounted transaxle;  quickly, things would break.

Diagram showing balance shaft locations.

Bigger even than the Pontiac Trophy 4, large displacement four cylinder engines were once common although some were exceptional.  Fiat in 1910 built two of their S76s to contest the world LSR (land speed record) and they were an hefty 28.4 litres (1730 cubic inch), the “Beast of Turin” using its then impressive 290 horsepower (216 kW) to attain a one-way speed of 132.27 mph (213 km/h) but, because it was not possible for the team to make the “return run” (ie in the opposite direction) within the stipulated one hour, the LSR remained with the Blitzen Benz which in 1909 had set a mark of 125.94 mph (202.65 km/h).  On land, never again would anyone build a four with the capacity to match the Beasts of Turin but units with displacements approaching 5.0 litres (305 cubic inch) were not uncommon during the inter-war years.  However, the technology of the internal combustion engine (ICE) greatly advanced during World War II (1939-1945) and one consequence of that was engine speeds rose and less displacement was required for a specific output, both factors which conspired to make the big fours unfashionable.  They did however make a comeback in the 1970s when the clever trick of “balance shafts” enabled the inherently chronic second order harmonic vibrations to be “dampened out” and Porsche between 1991-1995 produced a 3.0 litre (183 cubic inch) range which used the technique.  The balance shaft was invented early in the twentieth century by English engineer Frederick Lanchester (1868–1946) but it was Mitsubishi which in the 1970s patented their “Silent Shaft” system and although Porsche developed their own version, they worked out the Japanese design was superior so used that instead, paying Mitsubishi a small royalty (under US$10) for each one installed.  A balance shaft uses two counterweights (looking something like small hockey pucks with the shaft running through them), set some 1½ inches (40 mm) apart and turns at twice the engine-speed.  With one shaft mounted high on one side of the engine and the other low on the opposite side, the pair counter-rotates, balancing the large reciprocating mass.  In that, the balance shafts can be thought of as a variation of a crankshaft's harmonic balancer.