Welcome to the Encyclopedia of Arkansas

Everything from Book cover featuring falling person reaching for guitar Fall Through to Meteorite on display including didactic text in library with bookshelves in background. Meteorites

This Day in Arkansas History

October 13, 1936

Pioneer cinematographer Freeman Harrison Owens received the patent on the method of drawing and photographing stereoscopic pictures in relief (3-D technology). The patent was later bought by Entertaining Comics (EC) publisher Bill Gaines. Owens is credited with 11,812 inventions, among them the A.C. Nielsen Rating System, a plastic lens for Kodak, and the method of adding synchronized sound to film.

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About the Encyclopedia

The CALS Encyclopedia of Arkansas is a free, authoritative source of information about the rich history, geography, and culture of Arkansas. It is updated regularly to ensure the people of Arkansas have an accurate and accessible resource to explore our heritage. We invite you to browse our text entries and media galleries to learn more about the people, places, events, legends, and lore of the 25th state. We are continually adding new entries, photographs, maps, videos, quizzes, lesson plans, and more, so check back frequently to see what’s new.

New to Arkansas?
New to Arkansas?

Our overview page covers everything you would want to know about our beautiful state, including state symbols, demographics, and more!

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