Google is digitizing 10 million photos from the the LIFE Magazine archives.
Search millions of photographs from the LIFE photo archive, stretching from the 1750s to today. Most were never published and are now available for the first time through the joint work of LIFE and Google.
Here are a couple mathematical ones.
Caption: Cadets swinging slide rules in right hands and textbooks in left, marching to mathematics class at the US Military Academy at West Point.
Caption: Geometry gadgets used to help teach plane and solid geometry.
[Via The Mathematical Tourist]