"The spider's errant movements leave their telltale tracks in a distorted web," Witt wrote in 1954. "And we were delighted to discover that each drug always produced its own distinctive aberrations in the spider." Seven of those shapes are below -- try to match the right drugs to the right webs.
This web looks pretty normal to me -- what do you think this spider was on?
Okay, this spider was definitely on drugs. Which one, though?
Hmm. Something's not quite right here.
Whoa this spider was hiiiiigh. But the drug it was on will surprise you.
This is a tough one.
Last one! Wow this spider was totally messed up.