Essays and observations on the construction and graduation of thermometers, and on the heating and cooling of bodies / By George Martine.

  • Martine, George, 1702-1741.
Date:
1772
Catalogue details

Licence: Public Domain Mark

Credit: Essays and observations on the construction and graduation of thermometers, and on the heating and cooling of bodies / By George Martine. Source: Wellcome Collection.

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    brock’s experiments t an Iron Rod heated, but not reddened in the fire to have been lengthened 276 degrees of his Pyrometer ; which falls on gr. (222X°432=) 969 in our fcale. In Sir J/aac’s reckoning the heat of a fmall pit coal fire unblown and of Iron heated red hot in “it was gr. (222 +325) 1049 4+, Anda rod of Steet heated in the fire till it was'red, Dr. Myf chenbrock + found to be lengthened 364 of his de- grees; and confequently to have been heated to 364 180, | Sie. a ‘¢ our gr- 34 XT +322) 1095 : you fee not differ- ing much from 5ir Ifaac’s heat of a {mall pit coal- _ five. ; ; But he * gives out the heat of a fmall wood fire. as greater, amounting perhaps to his gr. 200 oF co) 80 210+ which is our gr. (HEX 4 32) 1408. And a greater fire he juftly reckons hotter ftill, efpeci- ally if blown with bellows. -Copper fhining hot from the fire Muffchenbroek ** lengthened 392 di-- é - 392 K 180 -yifions, . that 1s. to our gr. (e+ a=)t Eis Ba 4 Tent. Exp. Ac. Cim. Add. II. p. 476 48>: 4+-Phil, Tranf. Ibid. +: Tent, &c. Ibid. p. 48. 49- * Phil. Tranf. Ibid. ** Tent, &c. [bid, p- 49. 50-