This cartoon shows a worker harvesting rubber from a rubber tree on a rubber plantation. The sloped cut in the tree's bark funnels the rubber latex into a small cup. This technique was first used in ancient times to harvest wild rubber in the Americas, and is still used on rubber plantations today.

Image from Wonder Book of Rubber, 1947, copyrighted material of The BFGoodrich Company reproduced with the permission of The BFGoodrich Company.