This 1930 article from Popular Mechanics magazine (below) tries to explain the process of recording sound for animated cartoons in pseudo-scientific terms. There are all kinds of interesting and oddball facts bandied about, such as cartoons costing $20,000 per reel, and the artists themselves being able to draw the dialogue soundtrack (Huh??). The images are cool, and one seems to demonstrate an early method of matte photography. In a particularly dated reference the article’s author, in explaining that cartoons are popular all around the world, says, “They appeal alike to the Chinese Coolie and the Alaskan Indian”!
Click on thumbnail pages below for larger, readable images.
(Thanks, Leslie Cabarga)