A kind of hot metal typesetting used for letterpress printing, the Ludlow Typograph issued a font catalogue in 1958—pictured a gallery of fourth edition scalable patterns to supplement their available collection of typefaces and font families. Metal slugs are cast by the system, melted down and recycled in a cauldron in situ—preferable to some printing operations, as opposed to Linotype, as it was smaller and more affordable and always had fresh matrices for a run without worrying about running out of any given sorts. Though not made since the late 1960s when printing press technologies changed, the company estimates around sixteen thousand models were still in operations around the world, and replacement parts still being produced. See a video of one of the machines at work and many more type samplers at the link above.
synchronoptica
one year ago: a gallery of visual anagrams (with synchronoptica) plus the coronation of Napoleon and Joséphine
seven years ago: alternating tread stairwells plus assorted links to revisit
eight years ago: Basil Brush endangered, rampant post-factual disinformation, hybrid cigarettes plus a plant leverages physics
nine years ago: Kraftwerk in concert
ten years ago: fossilised phrases in English Christmas songs