Volume 1
A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer.
- Henry Enfield Roscoe
- Date:
- 1877-1892
Licence: Public Domain Mark
Credit: A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer. Source: Wellcome Collection.
566/792 page 550
![temperature of 26° and only contained 008 per cent, of boric acid. These lagoons produce no less than from 1,200 to 1,500 kilos of boric acid dail\r. In order to purify the com- mercial acid, which contains about 25 per cent, of foreign matter, it is re- crystallized from hot water and then dried in chambers heated by the suf- lioni. It is still a matter of doubt in what form the boric acid, thus obtained, oc- curs in the earth. The occurrence ot ammoniacal salts and sulphide of am- monium, together with the boric acid, is very remarkable. The most probable hypothesis appears to be that of Wohler and Deville,1 ac- cording to which the acid is derived from the decompo- sition of a nitride of boron, BN. Boron is one of the elements which 1 Ann. Chcm. Phann. ]\xiv. 72 and c.v- 7L](https://iiif.wellcomecollection.org/image/b28122409_0001_0568.jp2/full/800%2C/0/default.jpg)
