Here’s another one of those wonderful articles from Popular Mechanics magazine (September 1960) explaining the tricks behind creating animated cartoons: “TV Hit From A Cartoon Factory” by Thomas E. Stimson, Jr.
The piece includes a Huckleberry Hound storyboard sequence, character mouth chart and some great behind the scenes photos. Check out Carlo Vinci animating on the article’s second page (page 121). Read the whole piece through this link to Google Books.
(Thanks, Wynn Hamonic)