Showing posts with label Physics. Show all posts
Showing posts with label Physics. Show all posts

Monday, October 26, 2026

Gasoline

Gasoline (pronounced gas-uh-leen)

(1) A volatile, flammable liquid mixture of hydrocarbons, obtained from petroleum and used as fuel in internal-combustion engines or as a solvent.

(2) In the slang of drug users, marijuana, especially if notably potent (also as gas and there’s evidence both gas and gasoline have been used of other drugs).

(3) In slang, a cocktail made by mixing a spirit with an energy drink (the original believed to be a combination of vodka & Red Bull (a mix linked with fatalities in certain climatic conditions).

1864: As used to describe the “light, volatile liquid obtained from distillation of petroleum”, gasoline was a variant of Gasolene (trade-marked in the UK in 1862).  Gasolene was a petroleum-based lighting oil, sold by English publisher and tea & coffee merchant John Cassell (1817–1865) who branched out into lighting fuel, marketed as both Cazeline & Cazzoline (his publishing house Cassell & Co endures today as an imprint of the Octopus Group).  The surname Cassell was from the Anglo-Norman castel (a cognate of the English castle), from the Old French castel, from the Latin castellum, a diminutive of castrum.  The -eline suffix was from the Ancient Greek ἔλαιον (élaion) (oil, olive oil), from ἐλαία (elaía).  Etymologists speculate the spelling of gasolene (and thus gasoline) may have been influenced by Gazeline, an Irish product that was a clone of Cazzoline; either the promoters liked the assumed association with “gas” or simply they found it a more attractive word.  It’s thought the general construct (gas+o+line) was built with the “o” representing the Latin oleum (oil) and the ending a borrowing from the chemical suffix -ine.  The -ine suffix was from the Middle English –in & -ine, from the Old French -in, & ine, from the Latin -īnus, from the primitive Indo-European -inos.  It was used (1) to form demonyms (2) in chemistry to form names of chemical substances (especially basic (alkaline) substances, alkaloidal substance, or halogen elements’ (3) in anthropology to form vernacular nouns and adjectives relating to hominoid genera and (4) in commercial use generally.  The alternative form gasolene is extinct in every market except Jamaica.  Gasoline is a noun & adjective and gasolinic is an adjective; the noun plural is gasolines.

Moderne BV-Aral Tankstelle (modern BV-Aral gas station), Bochum, FRG (Bundesrepublik Deutschland (Federal Republic of Germany; the old West Germany, 1949-1990)), 1958.  The cars are an Opel Rekord (left), a Volkswagen Type 14 (Karmann Ghia) coupé (centre) and a Volkswagen Type 1 (Beetle) (right).  In the background stands the head office of the oil company BV-Aral AG.

In the US, the shortened form “gas” was in common use by at least 1897 but on the pattern typically applied, it’s likely it was around almost as soon as gasoline went on sale.  The “gas station” (place to fill up one’s automobile (“gassing up”) with gasoline by use of a “gas pump”) was recorded in California in 1916 and was part of the US vernacular by at least the early 1920s.  The “gas pedal” (the accelerator) was first recorded in 1908 and is still used even in markets where the term petrol is preferred, as in the phrase “step on the gas” (depress the accelerator (ie go faster)), used generally to suggest increasing speed or effort and not confined to automobiles.  Indeed, ever those driving EVs (electric vehicle) might sometimes be urged to “step on the gas”, and that can be a lively experience give the torque & power now generated by some.  The alliterative “gas guzzler” (a large or powerful car with high fuel consumption) was coined in 1973 after the first oil shock and in 1978 the US federal government imposed the first stage of its long-running “gas-guzzler tax” (CAFE (Corporate Average Fuel Economy)).  The noun gasohol (a gasoline with a small percentage of ethanol was coined in 1975, the mix another reaction to the increase in the oil price and occasional shortages in the era.  To “pour gasoline on the fire” is a suggestion some action is making an already bad situation worse.

Rod Stewart (b 1945), Gasoline Alley (1970).

The term Avgas (the construct being av(iation) + gas) was coined during World War I (1914-1918) when it was found the mix used in automobiles was unsuitable for aircraft, the latter needing a mixture with higher specific energy (ie high octane).  In automotive use, aviation fuel remains of interest to the handful of people still running in their original configuration certain high-performance V8 cars built in the US during the mid to late 1960s with very high compression ratios.  The machines are entertaining to drive, neophytes always impressed by the extraordinary "engine braking" but the drawback is the fuel is not as readily available as "pump gas" so trips to airports or specialist suppliers usually are required; additionally, the stuff is expensive.  The amount that has to be "blended" with pump fuel for the engines satisfactorily to run varies with the model but is one of the aspects making something like a Chevrolet Corvette L88 a high-maintenance mistress.  The use in North America (and a handful of other places) of “gas” to refer to what is otherwise generally known as “petrol” sometimes mystifies because in many markets the usual distinction for road transport is between vehicles fueled by diesel, petrol & gas (usually LPG (liquid petroleum gas) or CNG (compressed natural gas)).

ET (Entertainment Tonight) deconstructs Lindsay Lohan’s dance moves at a New Jersey gas station, October 2019.  With typical attention to detail, ET reported the routine was executed between gas pumps 3 & 4.

In chemistry, gas is matter in an intermediate state between liquid and plasma that can be contained only if it is (1) fully surrounded by a solid, (2) in a bubble of liquid or (3) held together by gravitational forces; it can condense into a liquid, or can (in rare cases) become a solid directly by deposition. The common synonym is vapor (also as vapour).  The word was a borrowing from the Dutch gas, coined by Brussels-based chemist & physician Jan Baptist van Helmont (1580–1644), from the Ancient Greek χάος (kháos) (chasm, void, empty space) and there may also have been some influence from geest (breath, vapour, spirit).  More speculatively, there were also the writings of the Swiss physician, alchemist, lay theologian, and philosopher of the German Renaissance Theophrastus von Hohenheim (circa 1493-1541 and known usually as Paracelsus) who wrote of kháos in the occultist’s sense of “proper elements of spirits” or “ultra-rarified water”, both of which accorded with van Helmont's definition of gas that he introduced to the world in Ortus medicinae, vel opera et opuscula omnia (The Origin of Medicine, or Complete Works (1648)) with the words Hunc spiritum, incognitum hactenus, novo nomine gas voco (“This vapor, hitherto unknown, I call by a new name, ‘gas’”).

Lindsay Lohan gassing up her Porsche, Malibu, California, April 2020.

The use in science in the modern sense dates from 1779; it was adopted for specific applications as technologies emerged or were commercialized: To describe a “combustible mix of vapors” the term “coal gas” was first used in 1794; the use in medicine for the analgesic N2O (nitrous oxide) was from 1794 (made famous in dentistry as “laughing gas” although the laughter was induced by impurities introduced in the early production processes rather than the intrinsic properties of N2O).  “Poison gas” dates from 1900, use of which would become notorious during World War I.  The meaning “intestinal vapors” emerged in 1882 while the not unrelated sense of “empty talk” was from 1847 (meaning something like “hot air”) although more positively, by 1953 “it’s a gas” meant “something exciting or excellent”, “a gasser” in 1944 meaning much the same.  James Joyce (1882–1941) in Dubliners (1914) used gas to mean “fun, a joke”, an Anglo-Irish form thought linked to the use of laughing gas in dentistry.  In drag racing “gassers” (so named because they were fueled by gasoline rather than methanol or nitromethane) were the most common of the highly modified road cars in the early days of the sport but the NHRA (National Hot Rod Association) in 1972 retired the category, split participating gasoline-powered vehicles into a number of classes.

Art Deco gas station, Beverly Hills, Los Angeles, California, 1931.

The “gas-works” was first described in 1914 and was a little misleading because they were actually bulk-storage facilities from which gas was distributed either by fixed lines or cylinders delivered to the premises.  The kitchen appliance the “gas-oven” was mentioned first in 1851 although “gas-stove” by then had been in use for three years.  The notorious “gas chambers” used by the Nazis in their mass-murder programmes are most associated with the attempt to exterminate the Jews of Europe but the first were built in 1939, as part of Aktion T4, involving the killing of those with physical and intellectual disabilities; these early facilities used carbon monoxide and were built within Germany's borders.  They served also to murder other prisoners and although by later standards inefficient, were adequate for the numbers involved.  As territories to the east were occupied, similar structures were built in those places and there were even experiments with “mobile chambers”, large, air-tight van coachwork added to truck chassis into which the engine's exhaust gasses were ducted.  Again, these worked but by 1941 the Nazis planned to exterminate as many a eleven million Jews and other "undesirables" and the most efficient method was found to be scaled-up fixed chambers (disguised as shower rooms) into which the hydrogen cyanide-based anti-vermin fumigant Zyklon B was introduced, permitting a throughput at the most productive death camps of some 5500 a day, sometimes for months at a time.  The term “gas chamber” was widely used during the post-war hearings conducted by the IMT (International Military Tribunal) at the first Nuremberg Trial (1945-1946) but as a method of judicial execution, many nations had by then at various times used such structures and the US only recently abandoned the method.

Roadsters line up to gas up, Gasoline Alley, Indianapolis Motor Speedway, May 1960.  This was one of the official postcards sold in the speedway's gift-shop.

Gasoline Alley remains the name of the garage area at the Indianapolis Motor Speedway.  That wasn’t the original name but in the 1920s, “gasoline alley” was drivers’ slang for the forecourt at the back of the garages where the cars were taken to refuel.  Whether linked or not, there was in the era a popular newspaper comic strip called Gasoline Alley and the use of the name soon extended to the strip dividing the two rows of garages.  It caught the public imagination and the facility managers in the early 1950s added signage, resulting in the whole area becoming associated with the term.  Because of reconstructions necessitated by fires, modernization & expansion, Gasoline Alley is not recognizable compared to its original appearance but the name remains, even thought actual gasoline is now rarely pumped, the open-wheel cars switching first to methanol (1965) and later (2006) ethanol; it’s only when other categories use the track that gasoline is in the tanks.  If the sport is compelled to convert to electric (or hopefully hydrogen) propulsion, the place is so vested with history the name is unlikely to change.

Saturday, October 24, 2026

Scallop

Scallop (pronounced skol-uhp or skal-uhp)

(1) Any of the various marine bivalve mollusks of the superfamily Pectinoidea (genus Argopecten (Pecten)) and related genera (attached to a substratum (genus Chlamys)), distinguished by moving in water by rapidly clapping together their pair of fluted shell valves.  “Scallop” is used of other molluscs (including certain clams and oysters) and for commercial purposes, all (in the broad) are classed with the “saltwater shellfish”.

(2) The edible adductor muscle of certain species of such mollusks, widely used in cooking (in some places sold as “sea scallops” to distinguish use of “scallop” from other dishes (made usually with thinly sliced meat)).

(3) Either of the shell valves of such a mollusk, usually having radial ribs and a wavy outer edge (often used decoratively).

(4) A scallop shell re-purposed as a receptacle in which food (usually seafood) is served (and often baked).

(5) In cooking, a thin slice of meat, either so cut or something thicker “flattened” by pounding with a “meat tenderizer”, mallet or similar implement.

(6) Any of a series of curved projections (classically as multiple, symmetrical crescents) cut along the edge, used in sewing, knitting & crochet of necklines and other hems and in gardening, carpentry, art, engineering and architecture, of such shapes, used variously.

(7) In historic use (most associated with the middle & late medieval period), the badge of pilgrim (in the shape of a scallop shell).

(8) In certain places, potato (variously prepared) fried in batter.

(9) In design or construction, to finish (an edge) with scallops.

(10) In cooking, to escallop.

(11) To dredge for scallops to harvest (practiced by a scalloper).

1350-1400: From the Middle English scallop & scallop (edible bivalve mollusk), an aphetic variant of the Old French escalope (shell (of a nut); carapace), a variant of eschalope (probably from the Proto-Germanic skaljô (shell, husk, or scale), perhaps connected with the Old Norse skalpr (sheath) and the Middle Dutch schelpe (shell), from the primitive Indo-European root skel- (to cut; to split)).  English picked up the sense “thin slice of meat” from an association with French use in this context.  The process of aphesis (in linguistics & phonetics the loss of the initial unstressed vowel of a word) would have been gradual (and regionally differentiated) but, over time, the initial “e-“ vanished, “escalope” becoming “scallop”.  The use generally of shapes (clothing, architecture, garden beds) began to appear in documents in the seventeenth century although the shell (especially the larger and more colourful) clearly had for centuries been used domestically (they were nature’s pre-made serving dish) and contents (not always seafood) often were baked “in the shell”, cookbooks dated as early as 1737 detailing the methods, extending the term to describing the “decorative scalloping” used at the edges of the pastry atop pies and slices.  Before that use, “escallop” (in the sense both of “scallop shell” and “edge or border (of fabric) cut in the shape of scallops” had appeared in the late fifteenth century with the verb escalloped (having the border or edge cut out in scallops) appearing at much the same time.  The now less common alternative spelling was scallop (still seen in the UK) and the adjectival forms scallopesque, scallopish & scalloplike are non-standard.  Scallop is a noun & verb, scalloper is a noun, scalloping is a noun & verb, scalloped is a verb & adjective and scallopwise is an adverb; the noun plural is scallops.

Australian culture: The potato scallop (or “cake” or “fritter”).

In the barbarian nation of Australia, the potato scallop is a prized delicacy but while the methods of preparation and final appearance vary little from coast-to-coast, the warring tribes cannot agree on the name.  Unfortunately, use doesn’t precisely align with the state & territory boundaries but, as a general principle, it’s (1) Potato Scallop (New South Wales, Australian Capital Territory), Queensland and Western Australia, (2) Potato Cake (Victoria, Tasmania and most of the Northern Territory or (3) Potato Fritter (South Australia).  The use of “cake” and “fritter” is based on the use of those words for other dishes of a similar shape while the consensus among the “scallop faction” seems to be the name as an allusion to the “thin slice” rather than the shellfish definition and that does make sense because a potato scallop is several times the size of a typical scallop and thus dimensionally closer to the meat concoction.  Historians of food attribute the regional difference in terminology to the various terms been imported from England (where the spelling scallop was also used, the spelling influenced by certain regional pronunciations), sometime during colonial or post-colonial settlement of the continent, all the forms appearing in the British Isles at some time (although “smack” & “fairy chip” either never made the trip or didn’t survive).  In the UK, also documented is the use to describe a sautéed potato (a shallow-fried round potato slice).

Scalloped potatoes: These are different from a “potato scallop” in being thinly sliced potatoes, baked in a dish with a cheesy sauce; it's a winter favorite.

Whatever the nomenclature, the potato scallop is a classic example of “fast food” because it contains the elements (fat, salt, sugar) humans, their relatives and ancestors for millions of years stalked savannahs or jungles to hunt and harvest.  In developed nations, such substances are of course now available 24/7 “off the shelf” and a slice of potato dipped in batter and deep-fried until a golden-brown is not recommended by dieticians for frequent consumption but, for purposes of record, a “perfect scallop” is crisp on the outside with a fluffy interior the consistency of mashed potato.  The reliable Australian Food Timeline notes the long presence of this delicacy, including one recipe published in a Queensland newspaper in 1905: “Boil two pounds of potatoes, dry well, and pound in a mortar, adding three ounces of butter, half-a-gill of cream or melted butter sauce, and seasoning of pepper, salt and nutmeg. When quite smooth, butter some scallop shells, put in a teaspoonful of mixture, brush over with egg, and bake till brown; serve with watercress.”  Whether the side-dish of watercress would much mollify the dieticians is dubious but customers seem unconcerned, the item to this day a fixture on the menu-boards of fast food outlets and one that has withstood the onslaught of Burger King (Hungry Jacks in Australia), McDonalds, sushi, falafels and other international invaders.  While there may sometimes be differences in the products, these are as likely to happen within as between the regional factions.  For those who which to get a flavor of Australian culture, there’s a Potato Cake Appreciation Society run out of “cake stronghold” Victoria.

Saint James scallop shell necklaces.

The scallop shell was a symbol of Saint James the Great, worn or carried by pilgrims who had travelled to his shrine in Santiago de Compostela in Galicia, Spain, where his remains are believed to lie.  James the Great was one of the Twelve Apostles of Jesus and, in the New Testament, it’s asserted that when beheaded, (circa 44 AD), he was the second apostle to die (after the notorious Judas Iscariot) and the first to be martyred, pilgrims adopting the scallop shell because of its connection to maritime legends surrounding the saint's remains and its abundance along the Galician coast.  The concave shape also made them a practical thing to have during pilgrimages (handy utensils and cups) and scallops came often to be carved into baptistries or on baptismal fonts with shells (now not always genuine) used by priests to pour holy water on a child, initiating a new soul on a pilgrimage toward heaven.  According to legend, after James was martyred, his decapitated body was cast adrift in an unattended, rudderless boat, guided by angels to Iria Flavia in Hispania, where, on a shoreline covered with scallop shells, a large rock closed around his body.  There are variants of the tale but that’s the most popular.  Symbolically, the shell’s distinct lines (radiating outward) were said to represent the many different roads and paths across Europe converging on the single sacred destination at Santiago de Compostela.  The other practical value in the object was as a “proof of pilgrimage”, pilgrims gathering the shells from the sands at Cape Finisterre as tangible evidence they had completed the journey to the saint's shrine.

The logo of the Roman Catholic parish of Mary, Queen of Martyrs in Carver, Massachusetts was built with a central scallop, the crosses representing the three churches (Our Lady of Lourdes, Saint Kateri Tekakwitha & Saint Peter).  The parish provides an explanation of the scallop’s place in Christian iconography, noting the role as a “guide for pilgrims” (it takes an imaginative leap) on the path to their destination and the symbolic value of “authentication of completion of task”.  Historically, for pilgrims in the medieval era, the journey often was undertaken to fulfil a penance given by a priest and to verify compliance there was no other way but to make the trek and then collect a souvenir to show at mass so the priest world “tick the dutiful penitent off the list”.  However, commerce rose to the occasion and by the twelfth century traders had identified a lucrative market, selling shells from what would now be called “pop-up” stalls near cathedrals and churches.  It was from the tradition of Saint James the Great that the scallop came to be associated generally with the notion of pilgrimage, extended ultimately to the Christian’s earthly journey to heaven evoking the Letter to the Hebrews in which it was written: “These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.” (Hebrews 11:13; King James Version of the Bible (KJV, 1611)).

Shell Oil’s logos: Greta Thunberg (b 2003) disapproves of all.

Shell’s current logo dates from 1971 and was a revision by French born US designer Raymond Loewy (1893–1986) whose work spanned a remarkable number of sectors in the era of mid-century modernism, extending from corporate logos, Studebaker’s post-war automobiles, the Coca-Cola bottle & vending machines, locomotives and farm equipment; he had quite a portfolio.  For the company, a shell was always in the branding but the first image was pure “generic shellfish” and not until 1904 did something recognizably “a scallop” appear.  Unlike the use in Christianity, the logo of Shell Oil is wholly secular.  In 1833, an enterprising trader set up in London an import company to sell seashells to collectors and it stayed a family business, the product-mix shifting when a scion (Marcus Samuel, later Lord Bearsted; 1853–1927), sent in 1892 to the Caspian Sea to collect saleable specimens, realized there was potential in exporting the “lamp oil” that bubbled from the ground.  Accordingly, the company commissioned the world’s first purpose-built oil tanker (naming it the SS Murex, from the Latin where it described a type of shellfish with a highly sculptured, elongated shell with distinctive spines or fronds) to enter the market; by 1907, the company had a fleet and “the age of oil” had begun.  The origin of the Latin murex is murky.  Etymologists suspect it may be from mūs (mouse), source of mūsculus (saltwater mussel) but, along with the Ancient Greek μύαξ (múax) (sea mussel) it may be from a Mediterranean substrate language.  So, what was once the Shell Transport and Trading Company became famous as “Shell Oil” although the corporate identity has over the years changed; long known as “Royal Dutch Shell”, it’s currently listed as Shell plc (publicly limited company), the word “oil” now avoided in corporate branding by fossil fuel traders.

Scallop theorem is from the discipline of fluid dynamics; it states that to achieve propulsion at low Reynolds number (in physics, a dimensionless parameter that determines the behavior of viscous flow patterns) in simple (ie Newtonian) fluids, a swimmer must deform in a way that is not invariant under time-reversal.  Introduced in the paper Life at Low Reynolds Number (1977) by physicist Dr Edward Mills “Ed” Purcell (1912–1997) who shared 1952 Nobel Prize in Physics, scallop theorem used math to prove that at microscopic scales (where the Reynolds number is extremely low), a swimmer executing a reciprocal motion (a sequence of movements identical when played in reverse (a la a scallop opening and closing its shell)) cannot achieve any net movement.  It means in cases where the subject’s mass is negligible compared to water's viscosity, this method of propulsion fails.  Tiny organisms (cells, bacteria and such) cannot push water out of the way and thus use flagella (whip-like cellular appendage) to move through water; the motion is thus less of a “swim” (in the conventional human sense of the word” and more of a “screw” as ship designers would understand.  At these scales, viscous forces overwhelm inertial forces, a “return stroke” perfectly cancelling the progress of a “forward stroke”; whatever the energy expended, a “microswimmer” would be left “wiggling in place”.  The theorem ceases to operate at the mesoscale (the range between between microscale and macroscale) because inertia is no longer zero so the mechanical action can provide propulsion.

Dr Purcell's Scallop Theorem explained by 632NM.

Although examples have been cited where scallop theorem doesn’t operate in situations where the definition suggests it should, it is accepted in orthodox science as a foundational principle in fluid mechanics, biophysics, and micro-hydrodynamics.  The critiques discussing the “breakdown” or “violation” of scallop theorem are not wrong but nor do they debunk, rather they provide examples of scenarios in which the theorem’s strictly defined mathematical constraints are bypassed, the most common example being “collective locomotion” in which multiple reciprocal micros-swimmers interact with one another, using their combined fields to generate movement.  Of course, in non-Newtonian Fluids (mucus, polymer solutions etc), the properties of the fluid breaks time-reversal symmetry and the necessary frictional resistance exists for the action (to varying degrees) to work.  All these so-call “edge cases” do is further validate the theorem by defining the exact boundaries where the original rules operate.

Application of a different scallop theorem: Lindsay Lohan cooking scallops & crab claws on a yacht anchored off Cannes while attending the Cannes Film Festival, May, 2017.

Stone Oven Grill's Pan Seared Scallops for two

Ingredients

10 scallops (5 per person)

Salt to taste

Pepper to taste

Truffle powder (Optional)

1 tablespoon avocado oil

¼ stick butter (some prefer to use more)

Splash of white wine (some prefer to use more)

Instructions

(1) Lay scallops out on a cutting board and pat dry on both sides with paper towels.  Season all over with salt & pepper and (optional) truffle powder.

(2) Heat avocado oil in a large pan over medium high heat and once heated, add scallops to pan.  Work scallops in batches, ensuring pan is never overcrowded the pan.  Cook for 3 minutes per side; 30 seconds before the first flip, add butter to the pan to begin the melt.

(3) After flipping scallops, begin basting them with melted butter; continue basting process for the first two minutes.  While basting need not be continuous, it must periodically be done during this time.  Add white wine with 1 minute remaining and continue to baste, removing scallops once final minute is up.  Serve immediately.

Notes

Pan seared scallops, mid sear.

With a texture unique in the world, scallops offers many possibilities and the pan seared variety is a favorite, one of its many attractions being needing few ingredients, simple equipment (there are “basting spoons” available but a standard dessert spoon is serviceable) and but a few minutes preparation time.  It’s also one of those dishes amateur chefs can create at home and emulate exactly what real chefs so in real restaurants; it’s that simple.  Chefs do however have a few tips to prefect the process: (1) Pat scallops dry prior to cooking.  This is vital because it will remove any excess moisture liquid that can hinder the formation of the crust, a perfect crust being the essence of the dish.  The patting process takes only a couple of minutes: Lay them out flat and pat both sides dry with and absorbent paper towel.  (2) Pan must be hot prior to beginning the searing.  (3) Do not overcrowd pan.  While it’s tempting to fill the whole surface area, results are much better if no scallops are touching with each given a little “room to move”.

Evening gowns with scalloped necklines in a vibrant red by Georges Hobeika (b 1962) from his Spring-Summer 2017 Collection.  The scalloped cut-outs framed a sheer illusion panel, with an understated waist bow and the look worked best with a sleeveless bodice (left), the full-length sleeves and additional intricacy (right) a distraction.

Although never has the scalloped neckline defined the look of a season, never has it vanished and even if from time-to-time seen only rarely on the catwalk, it has remained a staple of high street fashion.  In the narrow technical sense, something qualifies as a “scalloped hem” by virtue of the shape being repeated along whatever line is being finished but the effect is most obvious only beyond a certain dimension.  If the arc of the curves is too small, the look can “become lost” although, paradoxically, the small scale most closely emulates the edge of a scallop’s shell.  While it shouldn’t be treated as a “rule”, as a general principle, smaller scalloping adds refinement while a larger cut is a “statement” or “playfulness” (depending on the garment) so it’s best to keep intent aligned execution.  What is possible successfully to achieve is dependant also on the fabric or material used, some scalloping demanding a degree of rigidity (such as with necklines although heavier fabrics can be difficult to persuade into the right contour) while other uses (like a skirt’s hem) can be more free-flowing.  On an outfit that really “busy”, scalloping can “get lost” in all the detail though that can work as a “highlight among highlights” if well done; it not, it’s just “making a mess”.  That’s why scalloping is recommended as a focal point, existing as the sole feature to draw the eye, explaining why designers like to add them to something sleeveless or strapless on a garment with little other detailing, even the most delicate lace inserts tending to draw the eye.

Lindsay Lohan in a black, off-the shoulder, floral cat-suit (with embedded crystals) from Balenciaga’s Summer 2024 collection, Kering Foundation’s annual Caring for Women dinner, The Pool, New York City, September 2024.

Although by any standards a “busy” fabric, this is an example of how scalloped neckline can work well if integrated with the whole.  Here, what the scallops did was “follow the pattern” and with the whole ensemble (including the very pointy knife pumps and “built-in” demi-gloves) in black, there was nothing extraneous to disturb the line.  What was clever about this piece was that although “floral” motifs intrinsically are made from curves, the overall effect was of straight lines (horizontal, vertical and diagonal) and that included the “squared-off” neckline, producing a nice effect highlighting the clavicles and bare shoulders.

1953 Aston Martin DB3S (Works).

When applied to cars, the term “scallop” is used with a different emphasis than with frocks and such in that what’s being referenced in the shell’s inside, the idea being of a shell used to “scoop out” some sand from where the sea has just receded, the lacuna creating a “scalloped” effect.  The Aston Martin DB3S was the factory’s standard competition model between 1953 and 1956 and despite being rather hastily improvised after the DB3 (1951-1953) was found to be uncompetitive (underpowered and too heavy), it enjoyed some success although it ran in an era when the Mercedes-Benz 300 SLR (W196S) and Jaguar D-Type had been perfected so championship trophies proved elusive.  The performance was however competitive and it was tough and reliable; as well as the eleven built for the factory’s team, a further 20 were sold to private teams and like the Maserati 250F, it enjoyed around the world a long career, running near the front even after obsolescent.

1953 Aston Martin DB3S front brake and scallop.  The holes were one of the many ways attempts were made to reduce temperatures (and thus “brake fade”) when using drum brakes; it was a lost cause, the answer being disc brakes.

The distinctive scallops in the “pontoon” front fenders were functional in being the most effective way to provide much-need cooling for the big Al-Fin aluminum, finned drum brakes.  Although the works cars quickly would adopt the vastly superior Girling disc brakes, right to the end of production these were an expensive option on the “customer” cars; tellingly, in the decades since, many such DB3s were upgraded to discs (some on all four wheels but most with a front disc-rear drum combination.  Although ducts to deliver cold air to brakes had long been common, the scallops were a most effective way to evacuate the hot air although, in one of those trade-offs familiar in engineering, the shape did at high-speed induce some unwanted handling characteristics, an experience many manufacturers would suffer in an age before prior testing in wind-tunnels became de rigueur and computers on which to run simulations were far in the future.  The DB3S was replaced by the DBR1 which used a form of brake cooling that didn’t so affect the aerodynamics and it proved effective, winning the 1958 World Sports Car Championship including a prized victory in the Le Mans 24 Hour endurance classic.

1958 Ferrari 250 TR.

With the standardization of disc brakes, Aston Martin didn’t carry over the DB3S’s deeply scalloped pontoon fenders but in 1958 they appeared on updated versions of the Ferrari 250 TR (Testa Rossa (literally “red head”, an allusion to the color of the cam covers), 1957-1961).  Although the looks and “end of an era” vibe have made the 250 GTO (1962-1964) the most prized (and expensive) vintage Ferrari, on the circuits, the 250 TR was much more successful, three times winning Le Mans (the final variant in 1962 the last front-engined car to win the event) and the World Sports Car Championship constructor's title.  The scallops were used on the 250 TR for the same reason Aston Martin fitted them: cooling the drum brakes.  Ferrari’s reluctance to adopt disc brakes will seem strange because by 1957 the technology was well proven; while the early disc system were sometimes noisy and pedal pressures could be high, they were effective, stopping distances shorter and fade less prevalent.  However, because Ferrari’s focus was on longer-distance events rather than sprint races, virtues like reliability and robustness were afforded a premium and it was true there were advantages, the linings in drums wearing consistently unlike the pads on discs that suddenly could lose efficiency; additionally, the hard linings of a drum brake’s shoes lasting longer than the pads of the era, meaning it often was possible to complete an event without a lining change.  None of that much convinced the drivers who wanted better brakes and the technology anyway continued to evolve, improvements by Girling meaning Aston Martin’s pit crews were by 1958 able to effect a brake-pad change in some 45 seconds, less time than it then took to re-fuel.  In 1959, Ferrari accepted reality had bitten and disc brakes became a standard fitting on all 250 TRs.  One quirk of the production history is that of the 33 250 TRs built, the 19 allocated had either the scalloped “pontoon fenders” or an enveloping front section while the 14 sold to private customers were all “scalloped”.

1958 Lincoln Continental Mark III Convertible.

Despite the coincidence in the timing, it can with certainty be said neither the Aston Martin nor the Ferrari in any way influenced Lincoln’s designers, despite distinctive “scalloped” front fenders appearing on the 1958 Lincoln Continental Mark III, a vehicle that was a remarkable change from the restrained elegance of the (highly unprofitable) Continental Mark II (1956-1957).  Although eye-catching, the Lincoln’s scallops probably don’t make as much of an impression as they might because they have to compete for attention with other “highlights” of the styling including dagmars, slanted headlights in hoods, fins, rear fender skirts, skegs and a reverse-angle rear window; it was quite a gallimaufry, assembled in a package measuring 229 inches (5,817 mm) bumper-to-bumper.

Model Adriana Fenice (b 1994) in pink stretch top with scoop neckline.

In fashion, the “scoop” neckline uses a “scalloping” effect analogous with the use by Aston Martin, Ferrari and Lincoln, the industry jargon having separate terms to avoid confusion between a “scooped” and “scalloped” neckline.  Technically, the Mark III was conventional (just scaled-up) but it’s of note because at the time it was the largest passenger vehicle ever built using unitary construction (ie no separate chassis); it still is.  While a notable achievement in pre-modern body engineering, so much internal strengthening was required (especially for the convertible) that weight could be between 5,000–5,700 lb (2,300–2,600 kg), out-weighing even a modern EV (electric vehicle) like the Tesla Model S (2012-2026) that weighed in between 4,300–5,000 lb (1,950-2,270 kg) and the Lincoln didn’t have the excuse of carrying a big battery weighing 1,000-1377 lb (454-625 kg)).  The Lincoln also had drum brakes that, like the Ferraris, sometime fought an unequal battle with the physics of inertia.  The look really was “too much” (the “moment” for such things quickly passed) and was toned-down for 1959 & 1960 although what’s often forgotten is the 1958 range out-sold the 1961 version, the latter now regarded as a classic.  However, while the 1958-1960 body was a cul-de-sac, the 1961 Lincoln Continental endured for the rest of the decade and influenced the industry in a way (and to an extent) the earlier cars never did.  What happened in 1958 proved an outlier with scallops since only hinted at.

Wednesday, September 16, 2026

Photoflash

Photoflash (pronounced foh-tuh-flash)

(1) An alternative name for a flashbulb (mostly archaic), a lamp that emits a brief flash of bright light, used to take photographs in a dark environment.

(2) Of or relating to flash photography (industry use only).

(3) The precise point at which a flashbulb illuminates.

1925–1930: The construct was photo- + flash.  Photo (phot- the prevocalic) was a clipping of photograph and photo was from the combining form φωτω- (phōtō-) of Ancient Greek φῶς (phôs) (light).  The –graph suffix was from the Ancient Greek suffix -γραφω (-graphō), from γράφω (gráphō) (to scratch, to scrape, to graze), probably best known in the derived from -graphy.  Flash was from the Middle English flasshen, a variant of flasken or flaskien (to sprinkle, splash), likely of imitative origin.  In the sense used in photography, it was probably of North Germanic origin and akin to the Swedish dialectal flasa (to burn brightly, blaze) and related to flare.  The Icelandic variation from the Germanic was flasa (to rush, hastily to go).  The word photoflash has a long history as a technical term in photography and the manufacture of photographic equipment but three syllables was just too much for general use and the public used “flash” for just about all purposes, the odd necessity like “flashbulb” embraced to avoid confusion.  Photoflash is a noun; the noun plural is photoflashes.

The industry however needed to be precise so "photoflash" became a frequent modifier, required because of the modular nature of the flash equipment (originally not part of the camera apparatus proper) and even at the tail-end of mass-market analogue photography, not all cameras featured built-in flash-lamps.  A "photoflash" unit was the whole, packaged flash assembly that included the flash-lamp and its housing, the mounting bracket directly attached the unit to the camera's body.  Originally the units were designed to accommodate replacement lamps but in 1960s, single-use units were developed, styled usually as rotating cubes, thus permitting four shots; for industry and consumers it was a cheaper solution and convenient but was an example of the way in the post-war years convenience led to more plastic waste and pollution, the little cubes soon littering the environment rather like the "ring-pulls" that enabled cans of drink to be opened without the need for a tool (the so-called "church key").  Invented in 1959 by US engineer Ermal “Ernie” Fraze (1913-1989), the design was thought a helpful innovation but because they detached completely from the can, millions of the things were soon an environmental blight and, with sharp edges, a safety hazard too.  Under pressure, in the mid 1970s, the industry phased them out, replacing them with the still familiar non-detachable “stay-on tabs”.  The photoflash capacitor is used not only in cameras.  It is an electrolytic capacitor designed specifically to provide a pulse of high-voltage energy for a very short duration and as well as the use in conventional photography, they’re installed also in devices using solid-state laser power supplies including optical readers and some printers but, whatever the hardware to which they’re attached, the purpose is always a brief illumination.  Because of the requirements for feeding a very high current for a precise length of time, the greatest challenge during the development process was to ensure a reliable high discharge pulse without excessive heat generation and thus the physical expansion of components.

Three-frame spread of Lindsay Lohan being photographed at the point of photoflash.

Photoflash composition has two meanings: (1) The pyrotechnic material which, when loaded in a suitable casing and ignited, produces a flash of sufficient intensity and duration for photographic purposes and (2) the collections of techniques used by professional photographers when shooting in light conditions where the use of a photoflash is required.  This involves considering things like the available ambient light, distance, angles of surrounding surfaces & their reflective properties and the need for any filtering.  For professionals, photoflash devices (known variously as flashes, speed-lights, studio strobes and a number of other terms) are adjustable to an extent those used on consumer lever cameras typically are not, the relevant metric a product of the relationship between the distance between the subject & light source and what is called the focal length (dictated essentially by lens aperture).

RAF (Royal Air Force) 4½ inch (114 mm) Photoflash Bomb.

An example of a basic design that was "right" from day one, the RAF's photoflash was manufactured throughout World War II (1939-1945) with the only fundamental change the use of narrower fins on the Mk II version, the larger units found to be prone to inducing "lateral drift" in high winds.  The cardboard tubular body was closed at the tail by a dome while the nose was sealed by a diaphragm with a bush, into which was inserted the fuse.  A defined measure of flash composition was loaded between the front and the rear diaphragm with a central tube extending between each, filled with gunpowder.  As soon as a fused flashbomb was released from an aircraft, the fuse was operative, triggering the gunpowder at the desired height which burst the body of the photographic flash, simultaneously igniting the flash composition.

Photoflash composition was of critical importance in the photoflash cartridges used in photoflash bombs which were specialized forms of ordnance perfected during the early years of World War II.  Dropped from aircraft passing over enemy territory, they were fitted with a photoflash cartridge timed to detonate at a height chosen to optimize the spread of light over the area of interest.  The development of the devices had been encouraged by research confirmed only a small fraction of the bombs dropped by the RAF were coming within miles of hitting the target zone, despite the claims of aircrew.  For many reasons, the inaccuracy was understandable given that night bombing over distance was a new aspect of war, carried out by inexperienced aircrew in the cold and dark of night, while under fire from night-fighters and ground-based guns, all while trying to locate blacked-out targets.  In the early days, navigators could rely on little more than maps, charts, mathematics and the visual recognition of physical ground-features, the latter obviously marginal at night when cities were under restrictions making visible artifical light a rare sight.

RAF photograph taken from Vickers Wellington bomber over Berlin, 1941.  The ground is illumined by the flash while the unusual light patterns are from ground-based searchlights, the shapes a product of the camera's exposure length.

There would later be electronic innovations such as devices designed to let bombardiers “see through” cloud but the photoflash bomb (always in the RAF clipped to “flashbomb”) was a relatively simple approach that  scaled-up existing technology, the things essentially big versions of the flashbulbs used on cameras.  Given their size, they were capable for short periods of producing intense light of sufficient dispersal and luminosity to permit either a pilot accurately to position his craft for a bombing run or for surveillance aircraft to take aerial reconnaissance photos at a safe height.  Of great utility at the time, flashbombs are no longer part of the military inventory because of improvements in night-vision optics, radar and satellite imagery.  Without them, the RAF's bombing campaign would have been much less effective although, as it was, not until late 1943 was the Anglo-American effort operating at the scale required for the offensive to be strategically significant and until the last weeks of the conflict, the losses suffered by both the RAF and USAAF (US Army Air Force) were shockingly high.

RAF photograph taken from De Havilland Mosquito (pathfinder), Hamburg, 1943.  The shape at the bottom-left is the flashbomb exploding.

The pathfinder concept was a lead aircraft that would identify a target and then drop flares indicating a target-path & target-force for the main force.  Fast, robust and built quickly and economically by virtue of the plywood frame, the twin-engined Mosquito was ideal for the role.  One of the most versatile airframes of the war, it took the Germans some time to develop a fighter than could match its pace and De Havilland responded to that threat with even faster versions.  Remarkably, the Mosquito (which first flew in 1940) remained in production until 1950, radar-equipped versions serving with the RAF until 1952, the durable platform at the time the UK's only all-weather nightfighter until versions of the De Havilland Vampire (1943-1961) and Gloster Meteor (1643-1955) became available.  Few probably think of the Mosquito as as Cold War aircraft but such was the UK's technology deficit at the time there was no alternative.  As well as the use in the pathfinder role, PR (photo-reconnaissance) versions of the Mosquito flew night-time missions over Europe, Burma and the South Pacific, all using the flashbombs with a the same basic but effective engineering and method of construction that would for centuries have been familiar to fireworks makers: A cardboard tube, capped on both ends with metal stoppers and filled a flash powder charge, the fuse set to trigger after a certain time (length of the fuse determining detonation height).  Being a camera’s flashbulb writ large, the flash lasted only around 200 milliseconds but this was ideal for aerial photography and could be enough for a pilot’s visual orientation although flashbombs often were dropped in staggered clusters, providing an extended duration of enhanced visibility.

The much re-printed photograph of Sofia Loren (b 1934, left) and Jayne Mansfield (1933-1967, right),  Romanoff's restaurant, Beverly Hills, Los Angeles, April, 1957 (left) and, three months later, her eye similarly drawn, Shirley Perdew (1939-2020), seemingly unable to avert her gaze, looking at Jayne Mansfield (centre & right).  Ms Perdew had just been crowned “Miss Hollywood 1957” and, as a former “Miss Photoflash”, Ms Mansfield had been invited to afforce the voting panel.  The event had been held at Garden of Allah Hotel, built in 1913 as a private residence before in 1926 being converted into a residential hotel; it was demolished in 1959.

Ms Loren's sideways glance, one of the most famous in Hollywood's long history of such looks, variously has been interpreted as “sceptical”, “disapproving” and “envious”, the latter view perhaps most held by men.  Ms Loren herself explained things as "genuine concern" the pink satin gown might not prove equal to the occasion; on the night, there were several photographers covering the event and images shot from other angles illustrate why that concern was reasonable.  There has never been any doubt Ms Mansfield's "wardrobe malfunction" was "engineered and rehearsed", a trick suitably qualified women perfected in the age of the paparazzi.  In her pomp a significant figure in popular culture and a celebrity at a time they were less numerous and not as transitory, Ms Mansfield was a model & actress and what would later come to be known as a “multi-media personality”.  When young, she won a number of sponsored beauty contests including being crowned “Miss Magnesium Lamp”, “Miss Fire Prevention Week” and “Miss Photoflash” but it’s reported she drew the line at becoming “Miss Roquefort Cheese” on the grounds it “just didn’t sound right”, something on which she seems not to have expanded.  Reputedly, the chance to be “Miss Prime Rib” also was declined and while that sounds a missed opportunity, she was sentimental about animals.