Cupola

Cupola (pronounced kyoo-puh-luh)

(1) In architecture, a light structure on a dome or roof, serving as a belfry, lantern, or belvedere (some functional, some merely ornamental).

(2) Any of various dome-like structures (especially in architecture or one covering a circular or polygonal area).

(3) In naval architecture, a protective dome for guns on a warship

(4) In armored vehicles, a raised structure with a narrow aperture for viewing, sometimes fitted with a gun or flame-thrower.

(5) In geology, an upward-projecting mass of plutonic rock extending from a larger batholith.

(6) In metallurgy, a vertical, air-blown coke-fired cylindrical furnace in which iron is re-melted for use in casting.

(7) In geometry, a solid formed by joining two polygons, one (the base) with twice as many edges as the other, by an alternating band of isosceles triangles and rectangles.

(8) In anatomy, a small cap over a structure, shaped like a dome or inverted cup.

(9) In railway carriage design, a small viewing window in the top of the caboose (guard’s van) for looking over the train, or the part of the caboose where one looks through this window (obsolete).

1540–1550: From the Italian cupola, from the Late Latin cūpula (a small cask; a little tub), from the Classical Latin cuppella, from cuppa & cūpa (tub), from the Ancient Greek κύπελλον (kúpellon) (small cup), the construct being cūp(a) + -ula, from the primitive Indo-European -dlom (the instrumental suffix) and used as a noun suffix denoting an instrument.  The origin in Latin was based on the resemblance to an upturned cup, hence the use to describe the rounded top of just about any structure where no specific descriptor existed.  Cupola is a noun and cupolated & cupolar are adjectives; the noun plural is cupolas or cupolae.

Cupola on the dome of St Peter's Basilica, Vatican City, Rome.

In architectural history, the cupola is considered a descendent of the oculus, which may seem strange given the evidence suggests domes came first but a cupola is something which can be added to a dome and the earliest may have been “bolted on” when the open nature of an oculus proved troublesome.  Fitted with one or more windows, they would still permit the entry of light but keep out the wind and rain.  From this functional origin, they became popular as features to crown turrets, roofs, and larger dome.  Confusingly, architects at one point decided a cupola was also the inner vault of a dome so historic plans and descriptions need to be read with care.  Although classically dome-like in shape, most modern cupolas are more angular.

Onion domes on the Kremlin, Red Square, Moscow, Russia.

Cupolas were a favorite in early Islamic architecture and began their proliferation the mid-late eighth century, presumably because they were a perfect decorative addition to a mosque’s minarets but such was the appeal they would appear also in the core of the building or at its corners.  Before long, they were a regular part of commercial and residential buildings, valued not only as decoration but as a light source and for the ease with which they could sit atop vertical ducts used for ventilation.  It was the Islamic influence which was responsible for the best known motif of Russian architecture, the onion dome which was well suited to the northern climate because, constructed with severe lines, effortlessly they resisted the gathering of snow.  The Moors brought the design to Spain and whatever religious conflicts may for centuries have disfigured the Middle East & Europe, Architectural taste proved ecumenical and onion domes can still be seen atop Christian churches in Austria and southern Germany.

US Marine Corps M17 flame-thrower in use, the M1919A4 Browning .30 caliber medium machine gun to the right is hard-mounted in the tank commander's cupola, South Vietnam, 1968.

In military use, a cupola is basically a helmet fixed in place and that may be on a building, a ship or an armored vehicle, the function being to protect the head while offering a field of view.  Sometimes, especially in tanks or armored cars, guns or flame-throwers were integrated into cupolas and in naval gunnery, there was the special use to describe the dome-like structures protecting a (usually single) gun mounting, something which distinguished them from the larger, flatter constructions which fulfilled the same purpose for multi-gun batteries.

Cupola on the International Space Station (ISS), outside & in.  Cupolas are used on space craft because they are a way of maximizing the window space for a certain amount of the hull’s surface area.

McMansion with turrets and cupola.

Although the moment seems to have passed, one recent trend in domestic architecture which really disturbed the arbiters of style was the proliferation in parts of the US of McMansions, huge houses of sometimes dubious build quality often in a confusion of architectural styles and adorned with balconies, turrets, columns and cupolas, the more the better.

Blister

Blister (pronounced blis-tah or blis-ter)

(1) A thin vesicle on the skin, containing watery matter or serum and induced typically by caused by friction, pressure, burning, freezing, chemical irritation, disease or infection.

(2) In botany, a swelling on a plant.

(3) A swelling containing air or liquid, as on a painted surface.

(4) In medicine, something applied to the skin to raise a blister; a vesicatory (blister agent) or other applied medicine (mostly archaic).

(5) In glass-blowing, a relatively large bubble occurring during the process.

(5) In roofing, an enclosed pocket of air, which may be mixed with water or solvent vapor, trapped between impermeable layers of felt or between the membrane and substrate.

(7) In military jargon, a transparent bulge or dome on the fuselage of an airplane, usually for purposes of observation or mounting a gun but used sometimes as a housing for rearward air extraction.

(8) In photography, a bubble of air formed where the emulsion has separated from the base of a film, usually as a result of defective processing.

(9) In metallurgy, a form of smelted copper with a blistered surface.

(10) A dome or skylight on a building.

(11) The moving bubble in a spirit level.

(12) The small blister-like covering of plastic, usually affixed to a piece of cardboard or other flat sheet, and containing a small item (pens, hardware items etc).

(13) As “blister pack” or “blister card”, the packaging used for therapeutic or medicinal tablets in which the pills sit under small blister-like coverings, often labeled sequentially (1,2,3 or Mon, Tue, Wed etc) to aid patients.

(14) As “blister packaging” a type of pre-formed packaging made from plastic that contains cavities; a variant of bubble-wrap.

(15) In slang, an annoying person; an irritant.

(16) The rhyming slang for “sister”, thus the derived forms “little blister”, “big blister”, “evil blister” etc).

(17) In slang, a “B-lister” (ie a celebrity used for some purpose or invited to an event when it’s not possible to secure the services of an “A-Lister”.  In industry slang, the less successful celebrity managers are “blister agencies”.

(18) To raise a blister; to form or rise as a blister or blisters; to become blistered.

(19) To criticize or severely to rebuke (often as “blistering attack”).

(20) To beat or thrash; severely to punish.

(21) In cooking, to sear after blanching

1250–1300: From the Middle English blister & blester (thin vesicle on the skin containing watery matter), possibly from the Old French blestre (blister, lump, bump), probably from the Middle Dutch blyster & bluyster (swelling; blister), from the Old Norse blǣstri (a blowing), dative of blāstr (swelling).  All the European forms are from the primitive Indo-European bhlei- (to blow, swell), an extension of the root bhel- (to blow, swell).  The verb emerged late in the fifteenth century in the sense of “to become covered in blisters” and the medical use (of vesicatories) meaning “to raise blisters on” is in the literature from the 1540s.  The noun & adjective vesicatory dates from the early eighteenth century was from the Modern Latin vesicularis, from vesicula (little blister), diminutive of vesica (bladder).  In historic medicine, a vesicant (plural vesicants) or vesicatory (plural vesicatories) is used as an agent which induces blistering.  Typically a chemical compound, the primary purpose was intentionally to create a blister to draw blood or other bodily fluids to the surface, often in an attempt to relieve inflammation, improve circulation in a specific area, or treat various conditions indirectly by this counter-irritation technique.  Historically, vesicatories were commonly used with substances like cantharidin (from blister beetles) being applied to the skin to achieve this effect but in modern medicine the practice is (mostly) obsolete because more effective and less invasive treatments now exist.  Blister & blistering are nouns, verbs & adjectives, blistered is a verb & adjective, and blisterlike, blisterless & blistery are adjectives; the noun plural is blisters.

1968 MGC Roadster with bulge, blister and the bulge's curious stainless steel trim.

The MGC (1967-1969) was created by replacing the MGB’s (1962-1980) 1.8 litre four cylinder engine with a 2.9 litre (178 cubic inch) straight-six, something which necessitated a number of changes, one of which was the bonnet (hood) which gained a bulge to accommodate the revised placement of the radiator and, on the left-hand side, a small blister because the forward of the two carburettors sat just a little too high to fit even with the bulge.  Because to raise the whole bulge would have the bonnet look absurd, the decision was taken just to add a blister.  A blister (in this context) is of course a type of bulge and where a blister ends a bulge begins is just a convention of use, blisters informally defined as being smaller and of a “blister-like shape”, something recalling one appearing on one’s foot after a day in tight, new shoes.  A blister (which some seem to insist on calling a “teardrop” in they happen to assume that shape) also differs from a scoop in that it’s a enclosed structure whereas a scoop has an aperture to permit airflow.  There are however some creations in the shape of a typical blister which are used for air-extraction (the aperture to the rear) but these tend to be called “air ducts” rather than blisters.  MGC’s bulged and blistered bonnet has always been admired (especially by students of asymmetry) and both the originals (in aluminium which is an attraction in itself) and reproduction items are often used by MGB owners, either just for the visual appeal or to provide greater space for those who have installed a V8.  The apparently superfluous stainless steel trim piece in the bulge (there's no seam to conceal) is believed to be a motif recalling the small grill which was in a similar place on BMC’s (British Motor Corporation) old Austin-Healey 3000 (1959-1967), the MGC created because the 3000 couldn’t easily be modified to comply with the increasingly onerous US regulations.  Because there were doubts the cost of developing a replacement would ever be recovered, the decision was taken to build what was, in effect, a six-cylinder MGB.  The considerable additional weight of the bigger engine spoiled the MGB’s almost perfect balance and although a genuine 120 mph (195 km/h) machine, the MGC was never a critical or commercial success with only 8,999 (4,542 roadsters & 4,457 coupés) produced during its brief, two season life.

Republic P-47C Thunderbolt with the original colonnaded canopy (top) and the later P-47D with blister canopy (bottom).

When the Republic P-47 Thunderbolt (1941-1945) entered service with the USAAF (United States Army Air Force) in 1942, it was the largest, heaviest, single seat, piston-engined fighter ever produced, a distinction it enjoys to this day.  However, one thing it did share with some of its contemporaries was the replacement in later versions of the colonnaded canopy over the cockpit by an all-enveloping single panoramic structure which afforded the pilot unparalleled visibility, something made possible by advances in injection molding to fabricate shapes in Perspex, then still a quite novel material.  These canopies were adopted also for later versions of the The Supermarine Spitfire (1938-1948) and the North American P-51 Mustang (1941-1946) but the historians of aviation seem never to have settled on a description, opinion divided between “bubble-top” and “blister top”.

In military aviation, “blister” is more familiar as a use to describe the transparent bulge (or dome) on the fuselage of an airplane, usually for purposes of observation or mounting a gun but used sometimes to house a rearward air extraction device.  However, because of other linguistic traditions in military design, the “blisters” used as gun mounting position were also described with other words, the use sometimes a little “loose”.  One term was barbette (plural barbettes), a borrowing from the French and used historically to mean (1) a mound of earth or a platform in a fortification, on which guns are mounted to fire over the parapet and (2) (in naval use), the inside fixed trunk of a warship's gun-mounting, on which the turret revolves and used to contain the hoists for shells and cordite from the shell-room and magazine.

Meme-makers know whatever the advantages conferred by blister-packs, getting to the tablet can take a vital second or two.  Imodium is a medication used to treat occasional diarrhea.

Also used was turret, from the Middle English touret, from the Old French torete (which endures in Modern French as tourette), a diminutive of tour (tower), from the Latin turris.  In architecture (and later adoptions like electronic circuitry and railcar design), turrets tended to be variations of or analogous with “towers” but in military use there was a specific evolution.  The early military turrets were “siege towers”, effectively a “proto-tank” or APC (armoured personnel carrier) in the form of what was essentially a “building on wheels”, used to carry ladders, casting bridges, weapons and soldiers equipped with the tools and devices need to storm so fortified structure such as a fort or castle.  From this evolved the still current idea notion of an armoured, rotating gun installation on a fort or warship and as powered land vehicles and later flying machines (aircraft) were developed, the term was adopted for their various forms of specialized gun mountings.  In aircraft, the term blister came later, and allusion to the blister-like shape increasingly used to optimize aerodynamic efficiency, something of little concern to admiralties.

Mar-a-Lago, Ocean Boulevard, Palm Beach, Florida.

Another military blister was the cupola (plural cupolas or cupolae), from the Italian cupola, from the Late Latin cūpula (a small cask; a little tub), from the Classical Latin cuppella, from cuppa & cūpa (tub), from the Ancient Greek κύπελλον (kúpellon) (small cup), the construct being cūp(a) + -ula, from the primitive Indo-European -dlom (the instrumental suffix) and used as a noun suffix denoting an instrument.  The origin in Latin was based on the resemblance to an upturned cup, hence the use to describe the rounded top of just about any structure where no specific descriptor existed.  In military use, a cupola is basically a helmet fixed in place and that may be on a building, a ship or an armored vehicle, the function being to protect the head while offering a field of view.  Sometimes, especially in tanks or armored cars, guns or flame-throwers were integrated into cupolas and in naval gunnery, there was the special use to describe the dome-like structures protecting a (usually single) gun mounting, something which distinguished them from the larger, flatter constructions which fulfilled the same purpose for multi-gun batteries.  Turrets and cupolas are among the architectural features of Mar-a-Lago, Donald Trump’s (b 1946; US president 2017-2021) winter palace on Ocean Boulevard, Palm Beach, Florida.

Northrop P-61 Black Widow:  A prototype with the troublesome dorsal blister turret (left), the early production P-61A with the blister removed (upper right) and the later P-61B with the blister restored (lower right).

The attractive aerodynamic properties of the classic blister shape was an obvious choice for use in aircraft but even then, they weren’t a complete solution.  The Northrop P-61 Black Widow was the first aircraft designed from a clean sheet of paper as a night-fighter, cognizant of the experience of the RAF (Royal Air Force) which during the Luftwaffe’s (the German air force) Blitz of London (1940-1941) had pressed into service day-fighter interceptors.  Designed to accommodate on-board radar, the Black Widow was heavily gunned and incorporated notable US innovations such as remote control firing mechanisms.  Part of the original was a remotely-controlled blister turret on the dorsal section which proved the shape’s aerodynamic properties worked only when pointed in the appropriate direction; when pointed at right-angles to the aircraft’s centre-line, the tail section between the twin-booms suffered severe buffeting.  Accordingly, the blister turret was deleted from the early production versions but the early experience of the military confirmed the need for additional firepower and after a re-design, it was restored to the slightly lengthened P-61B.  The integration of so many novel aspects of design meant the P-61 didn’t enter service until 1944 and, as the first of its breed, it was never a wholly satisfactory night-fighter but it was robust, had good handling characteristics and offered the advantage of being able to carry a heavy payload which meant it could operate as a nocturnal intruder with a lethal disposable load.  It was however in some ways a demanding airframe to operate, the manufacturer recommending that when fully-loaded in its heaviest configuration, a take-off run-up of 3 miles (4.8 km) was required.  Although its service in World War II (1939-1945) was limited, remarkably, like the de Havilland Mosquito (DH.98), the Black Widow was also a Cold War fighter, both in service until 1951-1952 because of a technology deficit which meant it wasn’t until then jet-powered night-fighters came into service.  The Black Widow was in 1949 (by then designated F-51), the first aircraft in service in the embryonic USADC (US Air Defense Command), formed to defend the country from any Soviet intrusion or attack.

Xanax (Alprazolam), a fast-acting benzodiazepine.  It is marketed as anti-anxiety medication and supplied in blister packs.

Lindsay Lohan released the track Xanax in 2019.  With a contribution from Finnish pop star Alma (Alma-Sofia Miettinen; b 1996), the accompanying music video was said to be “a compilation of vignettes of life”, Xanax reported as being inspired by Ms Lohan’s “personal life, including an ex-boyfriend and toxic friends”.  Structurally, Xanax was quoted as being based around "an interpolation of" Better Off Alone, by Dutch Eurodance-pop collective Alice Deejay, slowed to a Xanax-appropriate tempo.

Xanax by Lindsay Lohan

I don't like the parties in LA, I go home

In a bad mood, pass out, wake up alone

Just to do it all over again, oh

Looking for you

Only one reason I came here

Too many people, I can't hear

Damn, I got here at ten

Now it's 4 AM

I can't be in this club

It's too crowded and I'm fucked

Ain't nobody here for love

Ain't nobody care about us

I got social anxiety, but you're like Xanax to me, yeah

Social anxiety, when you kiss me, I can't breathe

No, I can't be in this club

It's too crowded and I'm fucked

Ain't nobody here for love

Ain't nobody care 'bout us

 

I got social anxiety, but you're like Xanax to me, yeah

Social anxiety, when you kiss me, I can't breathe, yeah

 

But you're like Xanax to me

When you kiss me, I can't breathe

 

I try to stay away from you, but you get me high

Only person in this town that I like

Guess I can take one more trip for the night

Just for the night

 

Only one reason I came here

Too many people, I can't hear

Damn, I got here at ten

Now it's 4 AM

 

I can't be in this club

It's too crowded and I'm fucked

Ain't nobody here for love

Ain't nobody care about us

I got social anxiety, but you're like Xanax to me, yeah

Social anxiety, when you kiss me, I can't breathe

No, I can't be in this club

It's too crowded and I'm fucked

Ain't nobody here for love

Ain't nobody care 'bout us

 

I got social anxiety, but you're like Xanax to me, yeah

Social anxiety, when you kiss me, I can't breathe, yeah

 

But you're like Xanax to me

When you kiss me, I can't breathe

 

But you're like Xanax to me

When you kiss me, I can't breathe

Xanax lyrics Universal © Music Publishing Group

Dome

Dome (pronounced dohm)

(1) In architecture, a vault, having a circular plan and usually in the form of a portion of a sphere, so constructed as to exert an equal thrust in all directions.

(2) A domical roof or ceiling; a polygonal vault, ceiling, or roof.

(3) Any covering thought to resemble the hemispherical vault of a building or room; anything shaped like a hemisphere or inverted bowl.

(4) In water management, (usually in dam design), a semidome having its convex surface toward the impounded water.

(5) In crystallography, a form having planes that intersect the vertical axis and are parallel to one of the lateral axes.

(6) In geology, an upwarp (a broad anticline (a fold with strata sloping downwards on each side) caused by local uplift).

(7) In geology, a mountain peak having a rounded summit (a structure in which rock layers slope away in all directions from a central point).

(8) As vistadome, in passenger vehicles (usually railroad cars), a raised, glass-enclosed section of the roof of, placed over an elevated section of seats to afford passengers a full view of scenery (not usually truly in the hemispherical shape of a dome).

(9) In horology, the inner cover for the works of a watch which snaps into the rim of the case.

(10) A building; a house; an edifice (obsolete except as a literary device).

(11) As heat dome, a meteorological phenomenon in which the interplay of high & low pressure atmospheric systems interact to produce static, warm air over a large area.

(12) To cover with or as if with a dome; to shape like a dome.

(13) To rise or swell as a dome.

(14) In slang, a person's head (the form chrome dome used of the bald).

(15) In slang (both military and in some criminal classes), to shoot in the head (often in the form “got domed”).

(16) In African-American slang, to perform fellatio upon.

1505–1515: From the Middle French domme & dome (a town-house; a dome, a cupola) (which persists in modern French as dôme), from the Provençal doma, from the Italian duomo (cathedral), from the Medieval Latin domus (ecclesiae; literally “house (of the church)”), a calque of the Ancient Greek οἶκος τῆς ἐκκλησίας (oîkos tês ekklēsías).  Dome is a noun & verb, domed & doming are verbs and domelike, domical, domish & domesque are adjectives; the noun plural is domes.

By the 1650s, the formalized use in architecture ensured the meaning was (more or less) standardized as “a round, vaulted roof, a hemispherical covering of a building” and thus the ultimate specialized evolution from the Greek dōma (a house, housetop (used especially of those with a roof “in the eastern style”), from domos (house), from the primitive Indo-European root dem- (house, household).  The medieval use of the German dom and Italian duomo as verbal shorthand for “cathedral” (essentially a clipping from “house of God”) was picked up in the imperfect way so many words entered English to describe architectural features in the style of hemispherical cupolas, the domes at the intersection of the nave and the transept, or over the sanctuary, characteristic architectural feature of Italian cathedrals.  The sense in English of “a building, a house” had been borrowed in English as early as the 1510s and was used mostly of stately homes and it endures but only as a literary device and it’s rarely seen outside of poetry.

The shape occurs to one degree or another in nature and is common in man-made objects and the built environment so dome is an often seen modifier (cake dome, pleasure dome, lava dome; onion dome etc) and appears in the opening lines of one of the most cherished fragments of English verse: Kubla Khan (1797) by Samuel Taylor Coleridge (1772-1834).

In Xanadu did Kubla Khan
A stately pleasure-dome decree:
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea.

Some of the use has also been opportunistic and not especially domical.  Vistadomes were raised, glass-enclosed sections built into the roofs of railway carriages, placed over an elevated section of seats to afford passengers a better view of the scenery.  The idea was picked up by General Motors, the Oldsmobile Vista Cruiser station wagon (1964-1977), the Buick Roadmaster Estate (1991-1996) and the Scenicruiser busses (1954-1956 and made famous in the Greyhound livery some wore until the 1970s) all used raised, partially-windowed sections although none were officially described as “domes”.

The Hagia Sophia, now the main mosque in Istanbul; the minarets were added after the fall of Constantinople to the Ottoman Turks in 1453 and there are many architectural critics who maintain visually they improve the balance of the structure.  The illustration on the right shows how the Byzantine engineers used pendentives to make the construction of domes possible.     

Domes however are most associated with grand-scale, representational architecture (although quite a few builders of McMansions found them hard to resist).  One intriguing aspect of structural engineering upon which the integrity of a dome depends on what are called pendentives (the triangular segments of the lower part of a hemispherical dome left by the penetration of the dome by two semicircular vaults intersection at right angles).  Dating from 1727, pendentive was from the mid-sixteenth century French pendentif, from the Latin pendentem (nominative pendens) (hanging and the source of the English “pendulous”), the present participle of pendere (to hang) from the primitive Indo-European roots pen & spen- (to draw, stretch, spin).  What pendentives permit is the use of a circular dome over a square void square room or an elliptical one over something rectangular room.  Pendentives, (geometrically the triangular segments of a sphere), taper to points at the bottom and spread at the top to establish the continuous circular or elliptical base as required.  As structural supports, pendentives distribute the bulk of a dome’s weight to the four corners (the strongest points) and ultimately to the piers and the foundations below.  The classic example is the Hagia Sophia, the sixth century Byzantine cathedral at Constantinople (modern day Istanbul).  It was converted into a mosque when Constantinople fell to the Ottoman Turks in 1453 and, after a century-odd as a museum, is again a mosque.

Scale model of Germania.  Hitler would spend hours pondering the details but in 1945, he spent even longer looking at the model of what was planned for the Austrian city of Linz where he'd decided to have his tomb installed.

Domes have long been a favorite of emperors, dictators and those other megalomaniacs: architects.  A truly monumental one would have been the Volkshalle (People's Hall and known also as the Große Halle (Great Hall) & Ruhmeshalle (Hall of Glory), the centerpiece of Adolf Hitler’s (1889-1945; Führer (leader) and German head of government 1933-1945 & head of state 1934-1945) never realized plan to re-built Berlin as Germania, a worthy Welthauptstadt (world capital) of his “thousand year Reich”.  Although Albert Speer (1905–1981; Nazi court architect 1934-1942; Nazi minister of armaments and war production 1942-1945) was Germania’s chief architect, in some aspects he was really a glorified draftsman, correcting the technical errors in the drawings passed to him by the Führer who had be sketching parts of the design since the early 1920s.

Even by the standards of the super-dimensionality which was characteristic of the Third Reich, the domed hall would have been extraordinary.  The oculus would have been 46 m (151 feet) in diameter which would have accommodated the entire rotunda of Hadrian's Pantheon and the dome of St Peter's Basilica.  The  250 m (820 feet) diameter of the dome was (and this was a signature of Speer’s approach), bigger even than Hitler had requested and he was much displeased to learn of a rival architect’s plans for a dome 15 m (49 feet) greater in diameter to sit atop the city’s new railway station.  As things turned out, none of the grandiose structures were ever built and although a tinge of regret can be found in Speer’s post-war thoughts, even he admitted the designs were a failure because of “their lack of human scale”.

Berlin's rebuilt Reichstag with steel & glass dome.

Berlin did however eventually get a new dome, albeit it one rendered not in granite but the glass and steel the Führer thought was fine for factories and warehouses but which would have appalled him as a method of construction for public, representational architecture.  Plonked atop the rebuilt Reichstag, it was said to symbolize the reunification of Germany although quite how it managed that has never really been explained although the distinctive structure has become a city landmark and people seem to like it.  A clever design, it sits directly above the chamber of the Bundestag (the lower house of the bicameral federal parliament) and permits public observation, the clever design also reducing energy use by optimizing the input of natural light while moving shrouds minimize glare and heat-soak.

Cinerama Dome, Los Angeles in 1965, the year of its greatest commercial success.

The Cinerama Dome movie theatre sits on Hollywood’s Sunset Boulevard.  Opened in 1963, the Cinerama Dome introduced a new concept for film projection, a curved screen which sat inside a geodesic dome based on the design developed by US systems theorist & architect Richard Buckminster Fuller (1895–1983), one attraction of which was such things could be built at lower coast and in much less time than a conventional theatre building.  Intended to be the first of perhaps thousands around the planet, it was built in a still remarkable four months but it remains the only concrete geodesic on the planet and while it has operated intermittently since being closed during the COVID-19 pandemic, its future is uncertain and although it will probably be preserved as a historic building, it’s likely to be re-purposed as retail or restaurant space.

Lindsay Lohan at the Scary Movie V premiere, Cinerama Dome, April 2013.

The end of the line for Cinerama is another marker in the evolution of the technology which underpinned the evolution of the US economy from one based on agriculture, to one increasingly industrial to one geared around the military & entertainment.  In the 1950s, cinema’s greatest challenge came from television and the film studios fought back by creating differentiation in their products.  The venture into 3D proved a cul-de-sac for a number of reasons but one thing cinemas could do was make their big screens huge and during the 1950s the wide-screen Cinemascope enjoyed a boom.  However, there was a limit to how much screens could grow, hence the interest in Cinerama which projected onto a curved screen designed to take advantage of the way the human eye sees and processes images, the system at its best when provided by three synchronized projectors.  The idea lives on in the curved screens which have become popular among gaming freaks who enjoy the sense of “envelopment”.  It was also the era during which populations moved further from city centres into suburbs and thus, cinemas also needed to move, more of which (but often smaller) would be required.  Thus the attraction of the geodesic dome came which, largely pre-fabricated, was cheap to produce and quick to assemble.  However, Cinerama was expensive to film, to print, to produce and the sheer size and weight of the prints meant it was costly even to ship the material to venues and the conversion process to something which could be used with conventional projection.

Heat Domes

July 2023 Global heat map from the Climate Change Institute, University of Maine, USA.  For those unconvinced, Fox News continues to provide alternative facts.

The “heat dome” is a weather phenomenon, the physics of which has for decades been understood but of late the term has entered general use as much of the northern hemisphere has suffered from prolonged, unusually high temperatures, July 2023 measured as the hottest month ever recorded.  A heat dome occurs when a large, high-pressure system traps and concentrates hot air in a specific region, leading to prolonged and extremely high temperatures. Under a heat dome, the atmospheric pressure aloft prevents the hot air from rising and dissipating, effectively acting as a lid or cap over the area, thus the image of a dome sitting over the land.

The UK's Royal Meteorological Service's simple illustration of the physics of a heat dome.  Heat domes are also their own feedback loop.  A static areas of high pressure which already contains warm or hot air trapped under the high will become hotter and hotter, creating a heat dome.  Hot air will rise into the atmosphere, but high pressure acts as a lid and causes the air to subside or sink; as the air sinks, it warms by compression, and the heat builds. The ground also warms, losing moisture and making it easier to heat even more.

Radome

Radome (pronounced rey-dohm)

A dome-shaped device used as a protective housing for a radar antenna (although the word is loosely used and applied to structures of varied shapes in which radar equipment is installed).

1940–1945: A portmanteau word, a blend of ra(dar) + dome.  In electronics, radar is a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns and in figurative use refers to a means or sense of awareness or perception.  Dating from 1940-1945, radar was originally the acronym RADAR which was creation of US scientific English: RA(dio)D(etecting)A(nd)R(anging).  In the way English does things, the acronym RADAR came to be used with such frequency that it became a legitimate common noun, the all lower-case “radar” now the default form.  Dating from 1505–1515, dome was from the Middle French domme & dome (a town-house; a dome, a cupola) (which persists in modern French as dôme), from the Provençal doma, from the Italian duomo (cathedral), from the Medieval Latin domus (ecclesiae; literally “house (of the church)”), a calque of the Ancient Greek οἶκος τῆς ἐκκλησίας (oîkos tês ekklēsías).  Radome is a noun & verb; the noun plural is radomes.

Radomes at the Pine Gap satellite surveillance base, some 11 miles (18 km) south-west of Alice Springs (population circa 34,000) in Australia's Northern Territory (left) and a random radome which was blown onto an Indianapolis street by a storm (right).

Officially, the operation in Alice Springs jointly is operated by the defence departments of the US and Australia and was once known as the Joint Defence Space Research Facility (JDSRF) but, presumably aware nobody was fooled, it was in 1988 renamed the Joint Defence Facility Pine Gap (JDFPG).  The Pine Gap facility is a restricted zone so it's not a tourist attraction which is unfortunate because it's hard to think of any other reason to visit Alice Springs.  FoxNews in June 2025 published pictures of the “random radome” which had “fallen from the sky” in Indianapolis, Indiana after a severe thunderstorm swept through the region, wind gusts as high as 65 mph (105 km/h, 56 knots) measured.  The spherical cap was reported as being the size of a “small shed” and it was “parked” neatly, the flat base next to the curb and in case any of the conspiracy theorists in the Fox New audience began to speculate about alien invasions or government plots, it was revealed the radome came from an installation at the nearby tech infrastructure company V2X.

Lindsay Lohan on the cover of Radar magazine, June-July 2007.  The last print-edition of Radar was in 2008; since 2009 it's existed in on-line editions.

Dating from the mid 1940s, the word radar began as the acronym RADAR, (RA(dio)D(etecting)A(nd)R(anging)), coined in the US and entering English as a word within years.  Specialized forms are created as needed (radar gun, radar zone, radar tower, radar trap etc); radar is a noun, verb & adjective; the noun plural is radars.  In English, whether a string of letters is an acronym, abbreviation, initialism or word is determined both by form and organic process and the strings can emerge in more than one category.  Although it wouldn’t for a few years be known as radar, the system first became well known (within a small community on both sides of the English Channel) in 1940 because the string of radar installations along the English coast played such a significant role in the Royal Air Force’s (RAF) defense during the Battle of Britain, the crucial air-war fought that summer.  What the radar did was to provide sufficient notice of an attack to enable RAF Fighter Command to react to threats in the right place at the right time (altitude was always a problem to assess) by “scrambling” squadrons of aircraft on stand-by rather than having to maintain constant patrols in the sky, something which rapidly would have diminished resources.

Radomes don’t actually fulfil any electronic function as such.  They are weatherproof structures which are purely protective (and on ships where space is at a premium they also protect personnel from the moving machinery) and are thus constructed from materials transparent to radio waves.  The original radomes were recognizably domish but they quickly came to be built in whatever shape was most suitable to their location and application: pure spheres, planars and geodesic spheres are common.  When used on aircraft, the structures need to be sufficiently aerodynamic not to compromise performance, thus the early use of nose-cones as radomes and on larger airframes, dish-like devices have been fashioned.

North American Sabre:  F-86A (left) and F-86D with black radome (right).

Introduced in 1947, the North American F-86 Sabre was the US Air Force’s (USAF) first swept-wing fighter and the last trans-sonic platform used as a front-line interceptor.  Although as early as 1950 elements within the USAF were concerned it would soon be obsolete, it proved a solid, versatile platform and close to 10,000 were produced, equipping not only US & NATO forces but also those of a remarkable number of nations, some remaining in front-line service until the 1990s.  In 1952, the F-86D was introduced which historians of military aviation regard as the definitive version.  As well as the large number of improvements typical of the era, an AN/APG-36 all-weather radar system was enclosed in a radome which resembled an enlarged version of the central bosses previously often used on propellers.

What lies beneath a radome: Heinkel He 219 Uhu with radar antennae array.

The size of the F-86D’s radome is indicative also that the now familiar tendency for electronic components to become smaller is nothing new.  Only a half decade before the F86-D first flew, Germany’s Heinkel He 219 Uhu had entered combat as a night-fighter, its most distinctive feature the array of radar antennae protruding from the nose.  The arrangement was highly effective but, needing to be as large as they were, a radome would have been impossible.  The He 219 was one of the outstanding airframes World War II (1939-1945) and of its type, at least the equal of anything produced by the Allies but it was the victim of the internal politics which bedevilled industrial and military developments in the Third Reich (1933-1945), something which wasn’t fully understood until some years after the end of hostilities.  Remarkably, although its dynamic qualities should have made volume production compelling, fewer than 300 were ever built, mainly because Adolf Hitler (1889-1945; Führer (leader) and German head of government 1933-1945 & head of state 1934-1945): (1) was less inclined to allocate priorities to defensive equipment (attack always his preferred strategy) and (2) the debacle of the Heinkel He 177 Gref heavy bomber (which he described as “the worst junk ever manufactured) had made him distrustful of whatever the company did.

Peak dagmar: 1955 Cadillac Series 62 Coupe de Ville.

As early as 1941, the US car industry had with enthusiasm taken to adorning the front of their vehicles with decorative conical devices they intended to summon in the minds of buyers the imagery of speeding artillery shells, then something often seen in popular publications.  However, in the 1950s, the hardware of the jet-age became the motif of choice but the protuberances remained, some lasting even into the next decade.  They came to be known as “dagmars” because of the vague anatomical similarity to one of the early stars of television but the original inspiration really had been military field ordnance.  Cadillac actually abandoned the use of dagmars in their 1959 models (a rare example of restraint that year and not extended to the rest of the design) but concurrent with that, they also toured the show circuit with the Cadillac Cyclone (XP-74) concept car.

1959 Cadillac Cyclone (XP-74) concept car.

Although it was powered by the corporation’s standard 390 cubic inch (6.5 litre) V8, there was some adventurous engineering including a rear-mounted automatic transaxle and independent rear suspension (using swing axles, something not as bad as it sounds given the grip of the cross-ply tyres of the era) but few dwelt long on such things, their attention grabbed by features such as the bubbletop canopy (silver coated for UV protection) which opened automatically in conjunction with the electrically operated sliding doors.  The decorative rear skegs (borrowed from nautical use where there were functional) had been see on earlier show cars (notably the 1959 "twin bubbletop" Firebird III) and they appeared on the 1961-1962 Cadillacs in two versions: skeg short & skeg-long.

1958 Edsel Citation Convertible (left) and 1964 GM-X Stiletto, a General Motors (GM) "dream car" built for the 1964 New York World's Fair.

Most innovative however was a feature which wouldn’t reach volume production until well into the twenty-first century: Borrowing from the North American F86-D Sabre, two radomes were fitted at the front, housing antennae for a radar-operated collision avoidance system (ROCAS) which fed to the driver information on object which lay in the vehicle’s path including distance and the length it would take to brake, audible signals and a warning lights part of the package.  Unfortunately, as was often the case with the concept cars, the crash avoidance system didn't function, essentially because the electronics required for it to be useful would not for decades become available.  As the dagmars had, the Cyclone’s twin radomes attracted the inevitable comparisons but given the sensor and antennae technology of the time, two were apparently demanded although, had Cadillac more slavishly followed the F-86D and installed a single central unit, the response might have been even more ribald, the frontal styling of the doomed Edsel then still being derisively compared to female genitalia; cartoonists would have had fun with a Cyclone so equipped seducing an Edsel.  In 1964, there's never been anything to suggest GM's designers were thinking of the anatomical possibilities offered by an Edsel meeting a Stiletto.