Hand-lettered ad from 1906.
Good Teens Don’t Go Here, from Improving Your Health, 1963
This is really quite lovely when you look at the details. Transmission Brake for a Diesel No. 12 Motor Grader from the 1953 Caterpillar Tractor Parts Catalog.
Apparently Happiness Aids Digestion. From For Healthier Living, the Road to Health, 1954. Illus by A.K. Bilder
Another creepy cutaway from All About the Human Body, 1958
"Inside the Watch" from Questions and Answers about Everyday Science, 1961