A verbal communication from Dr. Hare, respecting some experiments made by him to ascertain the comparative heating or cooling influence of changes of density resulting from changes in pressure in dry air, and air replete with aqueous vapour : also, some experiments favourable to the idea that a vacuum has a capacity for caloric.

  • Hare, Robert, 1781-1858.
Date:
[1840?]
Catalogue details

Licence: Public Domain Mark

Credit: A verbal communication from Dr. Hare, respecting some experiments made by him to ascertain the comparative heating or cooling influence of changes of density resulting from changes in pressure in dry air, and air replete with aqueous vapour : also, some experiments favourable to the idea that a vacuum has a capacity for caloric. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    the changes of temperature, in experiments like those which he had been describing, showed, in Dr. Hare's opinion, that there was some- thing not yet understood respecting the transfer of heat in such cases. It was hardly reconcileable with the process of conduction or circula- tion, as ordinarily understood. In the experiments of De la Rive and Marcet, in which the enter- ing air being made to impinge upon the bulb of a thermometer, was productive of a fall in the thermometric column, it might be inferred, he conceived, that the bulb interfered with the access of caloric from the space. It was in fact the bulb upon which the air acted previous- ly to its distribution in the space where it could have encountered the due proportion of caloric.