Soup spots

In the course of some research for *an unspecified thing* I'm writing, I revisited Stanley Miller's original prebiotic soup paper. You know, the classic, origin of life experiment where he mixes up a bunch of chemicals in a flask and gets amino acids? I've talked about it here before. Anyway, I really liked the undergraduate-writing-a-lab-report quality of the images. Here's figure 2. Hand-labelled soup spots... awww.

Image: Science (1953)