Tyndall, John, 1820-1893 · New York : Appleton · leaf 123
pon the quality and dispo-sition of their sound-boards.1 Take the violin as an example. It is, or ought to be, formed of woodof the most per-fect elasticity.Imperfectly elas-tic wood expendsthe motion im-parted to it inthe friction of itsown molecules;the motion is con-verted into heat,instead of… … the strings. bow acrossabout of the length of the string from the bridge O O o 1 To show the influence of a large vibrating surface in communicatingsonorous motion to the air, Mr. Kilburn incloses a musical box within casesof thick felt. Through the cases a wooden rod, which rests upon the…
Sound
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