Researches into the laws of chemical affinity / by C.L. Berthollet ; Translated from the French by M. Farrell.

  • Berthollet, Claude-Louis, 1748-1822. Recherches sur les lois de l'affinité. English
Date:
1804
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Licence: Public Domain Mark

Credit: Researches into the laws of chemical affinity / by C.L. Berthollet ; Translated from the French by M. Farrell. Source: Wellcome Collection.

    65/220 page 59
    ART. VIII. ^ i itc 5 * • ■; ; i i| ! f' 2 I t l'? 1] Of Efflorescence. it f ?* • » * . ê . ii * * itA'J i» I I I « • 1 • y l ’ * - ' * ' ^ *' 1. SOME saline substances, but particu¬ larly the carbonate of soda, have the pro¬ perty of rising to the surface of the mass in which they are mingled, if that mass be in a certain state of humidity : the carbonate of soda yields soon afterwards its crystallizing water to the atmosphere, and loses, conse¬ quently, its crystalline form ; but the property t v - y . • f • . » \ ; which I would distinguish by the term efflto- rescence, is that by which a substance raises itself to the surface ; withdrawing itself there¬ by from the sphere of chemical a&ion. It is necessary that the soda combine with the carbonic acid which it can draw from the atmosphere, previous to its rising by efflores^ ? cence ; but the aélion of the carbonic acid, which
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