Report of the Annual Meeting Volume 6, PT. 1837

Report of the Annual Meeting Volume 6, PT. 1837

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1837 edition. Excerpt: ...p. 716, torn. ii. (2nd ed.), where the author asserts that the ratio 1-421 is deduced from observation of the sound produced by air inclosed in a tube, and endeavours to account for the excess of this value above another derived from the propagation of sound in free air, by the different radiation of heat in the two circumstances. This is contradicted by the assertion quoted above from Dulong's Memoir. obtained this ratio from his own experiments. In the next place he establishes, contrary to an opinion previously expressed by M. Biot, that with gases very different in their physical properties, such as hydrogen gas and carbonic acid gas, the nodal sections are exactly in the same positions in the same tube. This is an important fact with reference to the theory of vibrations of aeriform fluids in tubes, from which it readily follows that the relative velocities of propagation of different elastic fluids may be inferred from the musical notes they give out from the same tube; and taking the ratio of the specific heats of air to be that determined by direct observations on sound, the ratios for the other fluids will be immediately deduced from these velocities. Representing in general the ratio of the specific heats by 1 + /, the quantity / is taken by Dulong to be the measure of the thermometric effect produced by sudden and equal changes of density of the several fluids; then assuming the thermometric effects thus developed to be inversely as the specific heats under a constant volume, he is furnished with numbers to express these specific heats, that of air being expressed by unity. Hence by means of the ratios of the specific heats obtained as above mentioned, numbers expressive of the specific heats under a constant pressure are also...
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Product details

  • Paperback | 194 pages
  • 189 x 246 x 10mm | 354g
  • United States
  • English
  • black & white illustrations
  • 1236789423
  • 9781236789426