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Heinrich Hertz, head-and-shoulders portrait, made from lithograph

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Attached caption: "Heinrich Hertz of Germany who was the first to demonstrate that when an electric spark jumps through the air it causes electric waves in the ether similar to waves in water when a stone is thrown into a pond. The electric waves travel a

Emile Berliner 1851 – 1929 was a German-born American inventor and businessman. He is best known for his development of the flat disc record and the Gramophone. Berliner worked in the telegraph industry experimenting with sound recording and reproduction. He also developed a new type of phonograph, called the Gramophone. The flat disc records made of hard rubber were easy to produce, and the Gramophone was more durable and easier to use than earlier phonographs. These helped popularize recorded music. Berliner has been credited with developing the first microphone and the first telephone answering machine. His Berliner Gram-o-phone Company in 1895 later evolved into the Victor Talking Machine Company.

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portrait photographs emile berliner collection 1871 1965 series 12 photographs 1871 1965 undated emile berliner collection 1871 1965 emile berliner and the birth of the recording industry motion picture broadcasting and recorded sound division heinrich rudolph hertz heinrich hertz head and shoulders portrait early photography library of congress
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Date

1871 - 1965
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Source

Library of Congress
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https://www.loc.gov/
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Public Domain

label_outline Explore Heinrich Hertz, Emile Berliner Collection 1871 1965 Series 12 Photographs 1871 1965 Undated, Emile Berliner Collection 1871 1965

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portrait photographs emile berliner collection 1871 1965 series 12 photographs 1871 1965 undated emile berliner collection 1871 1965 emile berliner and the birth of the recording industry motion picture broadcasting and recorded sound division heinrich rudolph hertz heinrich hertz head and shoulders portrait early photography library of congress