Essays on the construction and graduation of thermometers, and on the heating and cooling of bodies / by George Martine ...
- Date:
- MDCCXCII [1792]
Licence: Public Domain Mark
Credit: Essays on the construction and graduation of thermometers, and on the heating and cooling of bodies / by George Martine ... Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![or pretended to be obferved by Thermometers, were to have the fame language; and fo be uiu- verfally underfiood. In this Thermometer the bulb is fuppofed to con* tain, as Dr Boerhaave * and Dr MufTchen'oroek | tell us, 11124 parts of quickfilver, which Hands at the lowed mark, or gr. o, in a very intenfe intole- rable cold, being furrounded with a mixture of fnow or beaten ice and fal ammoniac or fea-falt If the fame bulb be immerged in fnow or id thawing naturally, or in water beginning to freeze, the quickfilver is dilated, and fo riles in the tube 32 of thefe 11124 parts; and therefore the fpace of the tube from gr. o to the freezing point gr. 32, its divided into thefe 32 equal parts ||. When the Thermometer is placed in water brought to drong boilings (the atmofphere being in the condition formerly mentioned **,) the quickfd- ver is dilated 212 of thefe parts beyond its original bulk of 11124, fo as now to poflefs in the bulb and tube together a fpace equal to 11336 fuch parts: and the fpace from gr. 32 to gr 212, is di- vided into 180 equal parts or degrees of the Ther- mometer |f ; which, if the tube be long enough, may * Chem. I p 174. f Eff. de Phyf. 938. | Fahrenh. in Phil. Tranf. Abr. VI. 2. p. 52. Muflchenbr Diff. Phyf. p 680. Elf- de Phyf § 948. |] Fahrenh. in Phil. Tranf. Abr. VI. 2, p 52. ** $g.](https://iiif.wellcomecollection.org/image/b28041689_0036.jp2/full/800%2C/0/default.jpg)
