Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 63
OWING THE GERM OFTHE PHONOGRAPH IDEA 694 THE STORY OF THE PHONOGRAPH I.May there must be something with a surface largeenough upon which the puffs of air that camefrom the lips might beat. He coated somestrips of paper with paraffin-wax, and thesecoated strips he passed by hand up and downbehind a… … FACSIMILE OF EDISONS SKETCH FOK THE MOUELOF THE FIRST PHONOGRAPH fin. He reversed the motion of the coatedpaper slip and listened. Very faintly therecame back his original Hoo, hoo! He hadmade the diaphragm vibrate exactly as ithad done when he had shouted against it.He had made it puff the air,…
Children's literature
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