JF Ptak Science Books Daily Dose series [Also part of the History of Lines series]
So, Nat’rists observe a flea
hath smaller fleas that on him prey,
And these have smaller fleas to bite ’em, and so on ad infinitum.
–Jonathan Swift, 1733
There are a lot of triangles in this fabulous photo of the construction of the Empire State Building in 1931–a lot. At least fifty–more if you use your imagination or get your pinhole specs out. It is simply an excellent photo in which I’m seeing things of a reducible nature–not in the sense of a Sierpinski triangle/sieve/gasket, obviously–but just a simple exercise along those lines (ha!), experiencing the image by recognizing different sorts of boundaries within it.
[Source: New York Public Library Digital Collections, here.]