The Microstructure of Matter
Atomic Energy Commission Pamphlet - Pages 30-31
This is probably my favorite chart in this booklet. It sort of captures the sheer complexity of particle physics. It's sort of like chemistry before Mendeleev and the Periodic Table, or perhaps even before the distinction was drawn between elements and compounds. There was just stuff that interacted to form other stuff. Figuring out what was really going on took some serious thinking.