Ranging from zero (in the case of the circle) and infinity for squares—with seemingly few values in between—in the study of tessellations (see previously here, here and here) a Heesch number pertaining to a geometric shape is the maximum number of layers of identical copies of the same figure will bear with no gaps or overlaps.
Named for the geometer and mathematician Heinrich Heesch, who also made significant contributions to the field of tiling patterns and then unproven for colour theorem (the first mathematical proof by a computer) for mapping boundaries, he noticed that a one sort of planar shape, a square fused with a triangle would only accommodate one extra layer, as illustrated with these spandrels (from an architectural space between the top of arch and the ceiling) term referring to the teardrop arranged by contemporary Walther Lietzmann, and posed it as a general puzzle. Beyond the core, one can only form a signal corona of identical shapes—and whilst blocky polyominoes and tetrominoes seem to hold limitless promise at first glance, there still seems to be a limiting factor with no more than six deep.
Tuesday, 13 January 2026
heesch’s problem (13. 083)
Thursday, 8 January 2026
8x8 (13. 069)
leturfrรฆรฐi: an exploration of the graphic design heritage of Iceland through its greatest, recently departed historian
shoyu-tai: a fibre-based soy sauce single-serve container as an alternative to disposable plastic droppers
unfcc: Trump administration announces withdrawal from dozens of United Nations chartered organisations, saying their mission does not align with the US agenda
i’m t?w?e?n?t?y?-f?i?v?e?: artist records one word per day for a reflection on the passage of time
amour-propre: Chinese buzzword of the year ็ฑไฝ ็ข่ฎฐ (ai ni laoji, love yourself, my dear)—see previously
hemlock: Texas university has forbidden a professor from teaching a course on Plato
anodyne: a Singapore based technology company invents biodegradable, paper batteries that rely on no rare earths
gobelins: the famed French school of animation has a YouTube channel that features student films
Sunday, 4 January 2026
ten-forward (13. 058)
Via Kottke, wee enjoyed exploring these 360° panoramas of the interiors of several ships of vessels from the Star Trek franchise—the bridges, engine rooms, quarters, sick bays and corridors from ships from different series—see previously, see also. Sets include USS Voyager, and the original USS Enterprise plus -D and -E.
Tuesday, 30 December 2025
9x9 (13. 043)
the unforgivable sin of ms rachel: Tedium’s Online Video Awards and the problems with platforms
grunt work: AI has the potential to destroy career ladders—via Damn Interesting
grove press: the Mid-Century Modern covers and jackets of Roy Kuhlman
turbo moka: a thermodynamic redesign of the classic Italian coffee pot—see previously
gรขnditorul de la hamangia: reflections on a palaeolithic pair of artefacts
ieee spectrum: top climate tech stories of 2025—including atmospheric ammonia harvesting
i dislike dune with some intensity: JRR Tolkien was not a fan of Frank Herbert’s work
the imperfect homework machine: students’ experience with AI mirrors a Shel Silverstein poem
the year in search: more of Miss Cellania’s annual superlatives
Saturday, 27 December 2025
living flower (13. 036)
Masterful at marketing and self-promotion across all media, Salvador Dalรญ never encountered an art form that caused him to shy away from disrupting with his signature surrealism.
Though his career in jewellery design spanned for several decades, one could be forgiven for thinking it was a one-off project (see also) as his most radical creations were exhibited as a contemporary collection, with a forward for his 1959 catalogue calling them a protest against emphasis on precious materials. Craftsmanship was not reserved for costume jewellery, however, with diamonds, rubies, platinum and gold and some broaches and pendants were motile, as can be seen on the Pathรฉ newsreels clicking through to the source above. Modelling an ensemble of Dali´’s pieces is Madelle Hegeler including a leaf-veined hand, the Eye of Time Watch and a pair of garnet and pearl lips inspired by Mae West’s come-hither smile. More from Open Culture at the link up top.
Sunday, 21 December 2025
agitprop (13. 019)
Hacker emeritus, Jamie Zawinski, presents quite a memory dump sharing the original, mostly forgotten logo designs for the open source web-browser Mozilla that was created on commission by graphic designer Shepard Fairey to create a corporate brand back in 1998—a spin off of Netscape that would eventually become Firefox, featuring the dinosaur mascot and backgrounds and colour schemes inspired by the Soviet propaganda of Vladimir Mayakovskii and visual contemporaries.
One banner encouraging one to download the code even contains in translation the reference to the Proverbs chapter six: ะะะ ะะะะขะะะจะฌ ะะฃะะะข ะะฃะะ; ะะะกะะะะจะฌ ะกะะะะ ะ ะฃะะ ะะฃะะะข ะะ ะะฃะะ́ ะ ะะฃ́ะะ—Sit with crossed arms and there will not be flour, the verse admonishing to not give into slumber. Much more from JWZ at the link above.
synchronoptica
one year ago: the Southern Solstice (with synchronopticรฆ), president Musk plus assorted links to revisit
twelve years ago: Bjork’s private island, the blog is dead—long live the blog, Star Wars embraces fan-art plus saintly hand gestures
fifteen years ago: more unseasonable weather
Monday, 8 December 2025
department of the interior (12. 987)
Having encountered some of these brilliant and iconic Depression Era posters sponsored by FDR’s Works Projects Administration, we appreciated learning about the landscape architect and graphic designer behind the strategic and unified tourism campaign to promote US national and state parks, Dorothy Waugh, through an exhibit of seventeen of her placards—particularly at such a fraught time for these preserves, understaffed, subject to revisionist histories, corporate encroachment and surge-pricing. Due to the scope and scale of her work for the Civilian Conservation Corps’ infrastructure projects for the parks system, Waugh went from being the sole artist to hiring and supervising a team of draughtsmen and also produced easy to follow diagrams and designs, most workers unable to interpret blueprints and formal specifications, for the construction picnic areas and campsite conveniences as well as other basic structures. Much more from Print magazine at the link above.
Sunday, 7 December 2025
sounds about white (12. 984)
In contrast to last year’s officer holder, Pantone’s Colour of the Year (see previously—it’s truly not an annual tradition to keep a close eye on, though in this case, it’s not just the lower the stakes, the stronger the conviction) of Cloud Dancer seems a rather bland, neutral choice at first blush and a reversal of its previous pick of “Mocha Mousse” (someone said 2025: poop 2026: toilet paper)
but then an interesting one given the political climate in the US specifically and has instead courted controversy, given the election of Trump to a second term, accidental Nazi salutes, immediate assaults on programmes working towards diversity, equity, inclusion and accessibility both in the federal government and then followed by private industry, revisionist histories including erasure of Black contributions and America’s past of slavery, enabling racial-profiling and unleashing armies of immigration officers on cities to terrorise people whom appear to have non-caucasian heritage, freezing immigration while offering refugee status to Afrikaners and the courts again set to hear the administration’s argument in favour of overturning birthright citizenship, just focusing on the solely racist actions. It seems the trend institute was not just throwing in the proverbial towel—though we contend that they well could have just been calling it in with the selection and exalted copy sounding suspiciously machine-generated.
synchronoptica
one year ago: America’s first electric vehicle (with synchronopticรฆ), celebrating a century of Dick van Dyke, St Ambrose, the fallout of AI replacing hyperlinks plus Scrooge’s tombstone
fourteen years ago: US state department announces it will no longer tolerate homophobia plus an end-of-the-year-figure-with-wings
fifteen years ago: disingenuous transparency
sixteen years ago: COP 15 plus cable conglomerate to acquire NBC
Monday, 24 November 2025
9x9 (12. 953)
architectural digest: a guided two-hour walking tour of New York City’s most iconic buildings
1999 a.d.: a paleo-future vision from 1967 that asks if the cusp year will be too computerised, too cold
shinbun: a hypnotic, phrenetic collage of Japanese newspaper clippings from 1991 to the present—see also
meet the aphantasics: more on those who don’t form mental images
i wool survive: a flock of ostracised gay rams from Germany have a haute-couture debut on a Manhattan catwalk
electric pentacle: the occult detective Thomas Carnacki created by William Hope Hodgson who despite his supernatural inclinations has a skeptical side and is unafraid to use nascent technology as his red-herring or MacGuffin
doge: the US Department of Government Efficiency quietly closed down
field-expedient gadgets: preparing meals in maximum security plus other prison inventions
diorama: Theria Sofia reworks Polly Pocket sets—originally fashioned from a makeup compact as a toy
Tuesday, 18 November 2025
10x10 (12. 889)
trip hop: frustrated with his limited role in Massive Attack, Tricky embarked on his independent project Maxinquaye
chud atlantis: more regional car-dealership rococo from McMansion Hell
linguistic zombie hunting: a revival of the old prescriptivist superstition against ending a sentence with a preposition and the grammarians that support it
state capture: the revolving door between government and industry creating the post-democratic world order—via Quantum of Sollazzo
♾️ series: visual proofs that 1/4 + 1/16 + 1/64 + 1/256… yields ⅓
circlesquare: filmmaker Jaron Albertin’s rather disturbing music video for “Seven Minutes”
artful dodger: Victorian mugshots of juvenile offenders—via Nag on the Lake
stay puft: some facts all about marshmallows sealab: project Tektite and experimenting with submerged human habitats
giscardpunk: Fifth Republic techno-futurism reimagined—see previously
synchronoptica
one year ago: farming by lottery (with synchronopticรฆ) plus assorted links to revisit
twelve years ago: coded correspondence
thirteen years ago: Thanksgiving salutations
fourteen years ago: Bretton Woods and monetary unions
fifteen years ago: privacy and Google Maps plus trade unions and Ricardian economics
Thursday, 13 November 2025
ะตะถะตะดะฝะตะฒะฝะธะบ (12. 877)
Though many fall after the period of the Soviet calendar, which was in use along side traditional ones from 1918 to 1940 (see previously), the aesthetic and layout of the alternating five- and six-day weeks and
schedule of continuous production and colour-coded match this collection of pin-up ephemera featuring industrial prowess match closely with that original reform initiative—the design meant to endure not as perpetual or eternal as some outside sources reported the system to be but rather naturally cyclical and upon consultation regular and predictable and still planned around non-work days and “whose sore task does not divide the Sunday from the week.” The set is also an interesting observation on the artefacts of progress and commemoration and what society embraced as contemporary achievement. Much more from Print magazine at the link above.
synchronoptica
one year ago: assorted links worth the revisit (with synchronopticรฆ) plus Matt Gaetz nominated for US attorney general
twelve years ago: US corn policy, the Victorian internet plus timing vs on-demand
thirteen years ago: the phobia illustrations of John Vassos plus the Oxford Word of the Year
fourteen years ago: outlawing parody
seventeen years ago: phantom rings
Tuesday, 4 November 2025
patent pendency (12. 851)
A long established fact about the US Patent Office is its signature agnosticism regarding submissions and filings, only the competent authority of whether a proposal can be trademarked and copyrighted “to promote the Progress of Science and useful Arts, by securing for limited times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries” and not a judge of an idea’s quality or utility, though happy to collect registration fees, with any surplus above overhead operating costs being diverted to the general Treasury.
Accordingly we appreciated this context-free gallery—via Things Magazine—of the figures and schematics (for applications recently submitted—see previously). There’s something that defaults to a little sinister when trying to surmise what’s being conveyed in this illustrations. Of course the details behind the pictures and prototypes can be easily and fully researched on the registry. Examiners, whilst specialists in their respective fields, are not necessarily lawyers, whereas trademark attorneys field work involving intellectual property.
Monday, 3 November 2025
hey mabel black label (12. 847)
Founded in 1898 in Philadelphia Pennsylvania, the Fenton Label Company Incorporated specialised in commercial stickers, makers’ marks and gummed labels (see previously) and produced these wonderful sample sheets, like the pictured image from a 1940 catalogue, to advertise their range to potential clients. A wonderful graphic design and typological specimen, we can’t tell if all these North American businesses were actual brick-and-mortar shop fronts or were mock examples meant to demonstrate their printing possibilities but it proved to be a fun exercise to try to trace them down. The Hotel Barlum of Detriot did exist but it’s more of a challenge to track down the more generic brands, shops, services and agents and there are some choice vintage products to be found, such as non-poisonous salmon eggs, fruit tingle and something called original Canadian lotion. More from Present /&/ Correct at the link above.
Sunday, 2 November 2025
13x13 (12. 845)
norwalk platform: architect Jackie Ferrara ends her life, aged 95
antedating: lexicographers talks lexicography through canonical form
spoiler alert—some counties pronounce it as rhyming with stone: further exploration on British toponymy
index of multiple deprivation: UK office of government statistics releases its deciles of the most under-served
willy and the poor boys: Creedance Clearwater Revival (previously) released their third studio album on this day in 1969
loss-leader: an image editing tool on par with Adobe makes itself freely available to appeal to non-professionals
holy war: Trump readies troops for action in Nigeria to protect Christian popular despite a paucity of evidence for persecution
perfectly al dente: a research roundup of scientific investigations nearly overlooked
body horror: biopolitics, the body politic and David Cronenberg
police brutality: Sting and company release their debut album Outlandos on this day in 1978
county stripes: visualising US demographics and distribution—see also
anthimeria: the verbification of mystery writers—see previously
first woman of fluxus: Alison Knowles passes away, aged 92—see more, see also
Monday, 27 October 2025
mummers parade (12. 830)
Featured in full on Spitalfield’s Life, we found this abecedary by illustrator Marion Elliot of folklore and superstition to be an absolute delight whose risograph alphabet on exhibit is perfect for the height of the spooky season.
From the Abbots Bromley Horn Dance to the Cornish legend of the Mermaid of Zennor, with everything in between ranging from sin-eaters, corn dollies and The Wicker Man (see previously here and here). Adopt a letter and research further into the custom or myth each panel represents, but be cautious as these collections were not only regarded as didactic aides by the clergy, it was also believed that the alphabet possessed supernatural powers itself.
catagories: ๐, ๐ด๓ ง๓ ข๓ ฅ๓ ฎ๓ ง๓ ฟ, ๐ด๓ ง๓ ข๓ ท๓ ฌ๓ ณ๓ ฟ, ๐ป, ๐, ๐ง♂️
Saturday, 25 October 2025
modernity in metal and mirrors (12. 820)
With a mission to curate a vanishing aesthetic referred to as millennial or Chinese dreamcore—nostalgic but a bit mordant with the energy of moribund malls, architecture student Liu Yujia has crisscrossed the country on foot, bike and train documenting the building boom of the 1990s and 2000s that echoed the beginning of the era of economic prosperity and unprecedented growth as told through vernacular towers, industrial parks and ageing apartment blocks dismissed by many as ostentatious and ugly, with little regard afforded for their demolition as relics of China’s rise, cleared away to make room for more growth and development. Liu’s catalogue is focused on some ten-thousand structures already slated for the wrecking-ball, hoping to create an archive of these high-rise enclaves that were once important symbols of China’s ambitions for progress. More from Sixth Tone at the link above.
synchronoptica
one year ago: cruise packages and Gen Z (with synchronopticรฆ) plus international maritime signal flags
fifteen years ago: handmade heraldry
Friday, 24 October 2025
low life (12. 819)
Via Strange Company, we appreciated the chance to revisit a divisive, geometrically confounding interior design trend of the tiered- or sunken living room.
Invented by architect Bruce Goff and championed by the likes of Eero Saarinen and others, these intimate spaces enjoyed a cosmopolitan popularity from the late 1950s to late 1970s as sectional venues for social gatherings and while out of fashion and mostly the subflooring has been covered over with renovations, some choice conversation pits have been preserved. Pictured is another view from inside the 1958 Miller House of Columbus Indiana by Saarinen (see above) with designer Alexander Girard—now preserved as a historical site of the industrialist’s commission for a “very, very modern home.” More from Mental Floss at the link above.
Thursday, 23 October 2025
7x7 (12. 816)
east wing: for a nation that’s precious about conserving its precious little history, there’s not much outcry over Trump’s extensive remodel of the People’s House—see more
west bank: US vice president and secretary of state angry over a bill advanced in the Knesset to annex the larger of the two Palestinian territories against Trump’s twenty-point plan
parallax view: a glasses-free three-dimensional mapping demonstration
fairytale of new york: a tribute to the recently departed Alfa-Betty Olson and her Sin City Fables
schleicher’s pie: revisiting the constructed Proto Indo-European apologue—see previously
yerkรถkรผ vษ รงubuq: Russo-American summit in Budapest is cancelled and a raft of new sanctions are imposed on Moscow
arc de trump: plans drawn up for a triumphal arch over the Potomac
Monday, 20 October 2025
8x8
tor’s cabinet of curiosities: a collection of weird hagiographies
photographie de rue: photography student Lionel Derimais’ impressions of New York City in the winter of 1980
non-generative ai: artist Pablo Delcan responds to human prompts
canary in the coal mine: the collapse of US private equity firms echoes the collapse of the sub-prime real estate market that caused the Great Recession of 2008
to catch a thief: reconstructing the Louvre heist
grattacieli: the medieval skyscrapers of Bologna—see previously
breaker one-niner: the computer industry’s first challenge from the US federal communications commission was over frequency interference for citizens’ band radio—see previously
elevator pitch: podcasters debate listening to episodes at 2x speed
Wednesday, 15 October 2025
acervo (12. 798)
Via It’s Nice That we are referred to the repository, living archive of vernacular graphic design curated by one Alagoas native, Victor Yves, who began his collection after encountering the paucity of visual archives of Brazil’s northeast and resolved to create his own. The personal project of gathering “eye exercises”
(exercรญcios para os olhos) gleaned from posters, prints, pamphlets and other ephemera informed by naรฏve- and folk-art soon developed into an academic obsession by its own inertia of filling what would become an obvious gap in the region’s creative heritage, amassing a sizeable portfolio of influential contributors whose credit was missing from the national canon. There are over five thousand (and growing) artefacts to peruse in the gallery, each with a short biography of its provenance and artist plus a selection of other exhibits with similar energy.
synchronoptica
one year ago: an incredible Trump rally (with synchronopticรฆ) plus a creepy featurette
fourteen years ago: adventures in Ireland
sixteen years ago: blogging-block






