Acoustics, Light, and Heat

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W. Collins, 1877 - 299 pages
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Page 234 - ... conditions. He also showed that the same coefficient of proportionality between work and heat applied when the conversion was effected by means other than friction. His final result, obtained by friction of water (Phil. Trans., 1850), was that 772-5 foot-pounds of work at Manchester were equivalent to the quantity of heat required to raise one pound of water 1° F.
Page 25 - The reason is, that although the density of water is so much greater than that of air, yet its elasticity, as measured by its resistance to compression, is greater still.
Page 67 - ... the resonant cavity of the mouth, which can so alter its shape as to resound, at will, either to the fundamental tone of the vocal chords or to any of their overtones. Through the agency of the mouth we can mix together the fundamental tone and the overtones of the voice in different proportions. Different vowel sounds are due to different admixtures of this kind.

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