Among the material on the surviving reels is the earliest known recording of the NBC chimes, a broadcast of a high school basketball match (believed to be the world's second-oldest recording of a sports broadcast) and a historic 1929 recording of the 82-year-old Thomas Edison, with Henry Ford and President Herbert Hoover, speaking on a broadcast commemorating the 50th anniversary of the invention of the incandescent light bulb.
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The pallophotophone (also known as the RCA Photophone) was an audio recording device developed by General Electric researcher Charles Hoxie ca.