Outlines of a course of lectures on chemistry / by T. Garnett, M. D. member of the Royal Medical, Physical, and Natural History Societies of Edinburgh; the Literary and Philosophical Society of Manchester; the the [sic] Medical Society of London; the Royal Irish Academy, and professor of physics and philosophy in Anderson's Institution, Glasgow.

  • Garnett, Thomas, 1766-1802.
Date:
1797
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of a course of lectures on chemistry / by T. Garnett, M. D. member of the Royal Medical, Physical, and Natural History Societies of Edinburgh; the Literary and Philosophical Society of Manchester; the the [sic] Medical Society of London; the Royal Irish Academy, and professor of physics and philosophy in Anderson's Institution, Glasgow. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    tory difcovery, and which was afcertained by pro- ducing three different temperatures independent of a thermometer, and which were intended to ferve as a check upon it, and fhew whether it pointed to the different quantities of caloric that really ob- tained. Thefe thermometers, are however, liable to fome imperfections: the firft is, that they are inca- pable of meafuring great degrees of heat; becaufe the fluid which they contain, when heated above a certain degree, is converted into an elaftic vapour that would burft the veffel. Mr. Wedgewood has however, contrived an in- genious method of meafuring any degrees of heat, however intenfe, by means of fmall pieces of clay, which contrary to the general rule before mention- ed, contract in proportion to the degree of heat to which they are expofed. Another inconvenience to which thermometers are fubjecl:, is, that we cannot by means of them afcertain the degree of heat or cold that happens in our abfence. This is obviated in a great meafure by Mr. Sixe's ingenious thermometer, the indices of which point to the greateft degrees of heat or cold