Copy 1, Volume 1
A general system of chemical knowledge; and its application to the phenomena of nature and art / By A.F. Fourcroy. Translated from the original French, by William Nicholson.
- Antoine François, comte de Fourcroy
- Date:
- 1804
Licence: Public Domain Mark
Credit: A general system of chemical knowledge; and its application to the phenomena of nature and art / By A.F. Fourcroy. Translated from the original French, by William Nicholson. Source: Wellcome Collection.
519/542 page 281
![ter added fucceffively one at a time. This phofphorated fulphur remains liquid at 30 de- grees. All thefe compounds, as is evident, are more fufible than phofphorus itfelf, and much more fulible than fulphur ; which manifeftly de- pends on this, that they retain, in their combina- tion, a greater quantity of caloric than each of them contains feparately. So that a flight re- frigeration takes place at the moment when the combination takes place. That compound, which remains fluid till 4 degrees of tempera,- ture, appears, while preferved under water, as a white, or flightly-opaque lemon-coloured oik Thefe combinations may be made in the dry way, and in retorts, by collecting the product by diftillation, in a receiver half full of water ; they are fufed with rapidity, and even with ex- ploiion; it is, therefore* neceifary to ufe much precaution in treating them. Thofe which are formed with fufed phofphorus under water, by adding a fulphur to it, are accompanied by fwelling, and by jets thrown out of the veffeî,f particularly if it be rather brifkly heated. ] 7. Sulphurated phofphorus, or phofphorated fulphur, formed in the dry way, fwells up when thrown into waiter ; it difengages globules of gas which have a fetid garlic fmell, and are lu- minous in the dark; thefe globules are frequent- ly inflamed fpontaneoufly and with exploiion in the air. The water, which contracts in this eafe an acid quality, is manifeftly decompos'd in this experiment, as will be mentioned clfe- where?:](https://iiif.wellcomecollection.org/image/b29337525_0001_0519.jp2/full/800%2C/0/default.jpg)
