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

  • George Martine
Date:
1787
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, M.D. Source: Wellcome Collection.

    128/192 (page 118)
    ii8 The VARIOUS DEGREES ,] that the greateft heat ever produced by the direct j aaion of the lun in our air, or other bodies heat- > cd by it, fel^om reaches to gr. 84. And at ano- ther time *, though he raifes it a little higher, leeming to allow that the great dog-day heat may ^ come to gf- 90, he thinks it can fcarce ever go be- yond thefe bounds, or arrive at the heat of the hu- man body. But Sir Ifaac himfelf, in another place of his bookt, exprefsiy tells us, that he found the heat of boiling water only about three times great- er than the heat communicated to dry earth by the fummer fun. And fo, too. Dr. IMuffchenbroek iji reckoned it probable that the heat of boiling water is three times greater than the greateft heat com- municated to bodies by the fummer fun in his country, by thefe reckonings this heat amounting to gr. (32+*-f°=) 92. Nay, even in Italy, Borcl- li II and Malpighi § found this heat of the fun in mid-fummer only equal to the heat of the vifeera of hot animals, I fuppofe about 102; not a- deal higher than what Newton and Muflehen- broek reckoned. 23. All this may, I believe, commonly be juft: and ti'iie enough. But it is not fo univerfal, either * Chem. I. p. 156. -j- Priiicip. p. 508. « f Tent. Exp. Ac. Cira. Add. II. p. 22, 11 De Mot. Anim. II. Prop. 96, 221. $ Op. Port. p. 30.