Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 398
surface. A fixed mouthpiece is mounted over one endof the cylinder, when the axle is at its extreme position.The mouthpiece has a flexible diaphragm, provided at thecenter of its rear face with a small, sharp stylus, whichpresses against the plastic surface of the cylinder. When talking into the… … SIR WILLIAM THOMSON (1824-(Lord Kelvin.) MISCELLANEOUS APPLICATIONS 373 Any sound waves striking against the diaphragm set it intovibration, and the little stylus no longer traces an evengroove on the surface of the cylinder, but a groove whichis now of varying and constantly changing depth.…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
