For a really round-about work-related reason, I stumbled upon the Oregon State University archive of everything having to do with Linus Pauling.
Linus Pauling was a chemist during the time when it was most exciting to be a chemist. He won one Nobel prize (in chemistry) for his work on the chemical bond (fundamental, yes?) and another (for peace) for his activism against nuclear weapons. He did a lot of fabulous science, but until about a week ago, I knew him best as the CalTech scientist who proposed the wrong structure for DNA. (He proposed a triple helix, with the phosphates on the inside and the bases on the outside. Silly!)
At some point, someone at OSU ransacked his office and scanned everything they found, because this archive is chock full of cool stuff. Here are two of my favorites.
This one appears to be rules set out for the Pauling children while the adults were away for a week.