Report of the Board of Regents Volume 1878

Report of the Board of Regents Volume 1878

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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. 1876 edition. Excerpt: ...or leaving a differential resultant, we have abundant opportunities to exercise the judgment and discrimination of the most diligent observers. Professor Reynolds noticed that on some clear nights in May and June, 1875, when a heavy dew indicated considerable refrigeration at the surface, "the sound could invariably be heard as far against a light wind as with it," showing that the upward refraction from wind was completely counteracted by the downward refraction from diminution of temperature. This was observed not to be the case when the cloudiness of the night prevented terrestrial radiation and the deposition of dew.--(Proc B. 8., 1876.) It has thus been shown in the course of this discussion, that while the refraction of sound as illustrated by gas lenses, still retains its original interest as a striking class-experiment, the far more important examples of acoustic refraction constantly presented by the infinitely varied conditions of differing air-currents and of differing air-temperatures, have until very recently, attracted no attention, and their practical significance has been strangely overlooked. ON THE ORGANIZATION OF LOCAL SCIENTIFIC SOCIETIES. A letter from Professor Henry, Secretary of the Smithsonian Institution. "In answer to your question, as to the plan of organization and operation of a scientific association, I submit the following: "The object of your society being, as you inform me, to cultivate ' scientific taste and knowledge among its members, ' this object should be kept constantly in view, and care be taken that it be not interfered with by a tendency to waste the time of the meetings in the discussion of irrelevant matters, especially those which relate to the government and organization...
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Product details

  • Paperback | 190 pages
  • 189 x 246 x 10mm | 349g
  • United States
  • English
  • black & white illustrations
  • 1236794109
  • 9781236794109