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Fusible recording material

Two vertical sectional diagrams of a phonograph recording apparatus showing a corrugated horn, a cone-shaped diaphragm with a stylus, a dome-shaped sound reflector, and a small lamp used to heat the stylus, with labeled parts including horn (H), diaphragm (D'), cone (C), style (S), and support stem (M).

APPARATUS FOR RECORDING SPEECH OR OTHER SOUNDSWilliam Bruening · November 22, 1892

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