Volume 1

Elements of chemistry / By J. Murray.

  • Murray, J. (John), 1778-1820.
Date:
1801
Catalogue details

Licence: Public Domain Mark

Credit: Elements of chemistry / By J. Murray. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

    346/354 (page 330)
    acids; and the alkaline fluats are alfo decompof- ed by lime. They adl upon liliceous earth ; the j earth, alkali, and acid, forming a triple compound. — Fluat of Potash is very foluble in water, and j its folution may be evaporated to the confiftence i of a jelly, without obtaining any diftindl cryftal- 1 lization ; it is melted and decompofed by heat.—»- Fluat of Soda has limilar properties: it is rather lefs foluble in water, and decrepitates on expofure to a red heat.—Fluat of Ammonia forms a gela- I tinous folution in water, which depofits fmall , cryftals that are deliquefcent: they are melted , by heat, and fublimed with partial decompofition. Se5l. III. — — Boracic Acid. ] This is the laft of the undecorapofed acids. It ^ does not exift in great quantity in nature. The | combination of it with foda is a native produc- j tion, dug in an impure date from the bottom of j certain lakes in Thibet. When purified, it forms the borax of commerce ; and it is from this fait | that the boracic acid is obtained. Any quantity J > i of it is dilfolvcd in hot water ; and fuJphuric acid ! is added, till the folution has an acid tafte : as it ^ cools, white fcales are depofited. Thefe are the boracic acid; they are \vafiied with cold water, - to