Report of the Meeting of the British Association for the Advancement of Science Volume 6

Report of the Meeting of the British Association for the Advancement of Science Volume 6

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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: ...the velocity of sound in free air, and the length, such as it can be observed, of the concameration s that are formed in a flute-tube, is not verified exactly. He hints at some experiments proper for making evident the cause of this discordance, but I am not aware that any such have been published. As this method fails in giving exactly the ratio of the specific heats of atmospheric air, M. Dulong adopts a ratio (viz. 1-421) which he says "is the mean of a great number of direct observations made in free air by different observers." I mention this particularly, as it seems to have been supposed that Dulong M. Poisson'a excellent Treatise on Mechanics is a work so extensively used that it is desirable to point out any error that may have inadvertently crept into it. I do not therefore scruple to advert to an inaccuracy in 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. sound is propagated in them. 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...
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Product details

  • Paperback | 194 pages
  • 189 x 246 x 10mm | 354g
  • United States
  • English
  • black & white illustrations
  • 1236745957
  • 9781236745958