Edgar Rice Burroughs' "Tarzan of The Apes" first appeared on radio on September 12, 1932 in a syndicated serial that lasted for 286 episodes. Sadly only the first 77 episodes are known to have survived, meaning we are suddenly cut off mid-stream.
The show aired three times each week, on Monday, Wednesday, and Friday. Each episode, not counting commercials, ran for about ten minutes.
Below is part of a release from the sponsors Signal Oil & Gas Co:
"Saturday, September 10th, the first Radio Premiere on record presented to radio fans all over the State the first episode in the thrilling adventures of "Tarzan of the Apes," sponsored by the Signal Oil and Gas Company. Critics and thousands of motorists who jammed the World Premiere Radio Show at Fox Pantages Theatre in Hollywood proclaimed it the most fascinating and colorful radio program they had ever heard.
Among those who participated in the stage show were Jim Pierce, all-American football player and well-known actor, who takes the part of Tarzan in Signal's sensational radio serial; Miss Joan Burroughs, talented actress and daughter of Edgar Rice Burroughs; Mr. Burroughs himself, internationally known author of all "Tarzan" stories together with the entire Tarzan radio cast, including Lord and Lady Graystoke, Captain Tracy, Cecil Clayton, Yont, Professor Porter, Philander, (Joan Burroughs as Jane Porter and James Pierce as Tarzan).... "