198 Mr. Delaval on the Cauje of the 



analogous to the ordinary and conftant effcds, 

 which arife from chymical affinities. 



This may be exemplified, by any compound 

 which affumes a concrete folid confiftence, by its 

 union with a given quantity of a fluid, and which, 

 by the addition of a larger quantity of the fame 

 fluid, is reduced to a liquid ftate. 



Thus, when a due proportion of water is added 

 to iron, and vitriolic acid, a mutual attradion takes 

 place between thefe three ingredients, by means 

 of which they are united, and, by their combi- 

 nation, a concrete vitriol, or metallic fait, is 

 formed. But, if a greater quantity of water be 

 added to this concrete fait, as the mutual attrac- 

 tion, after this addition, fubfifts equably between 

 the vitriolic fait and the whole mafs of water, the 

 acid and ferruginous particles are more minutely 

 divided, and diffufed uniformly throughout every 

 part of the water. And thus, the folid concrete 

 fait is refolved, and a vitriolic liquor is formed, 

 in which the water predominates. 



Lime ftrongly attrafts and unites with inflam- 

 mable fub (lances, fuch as fulphur, camphire, and 

 refins. Fixed air has a ftill greater affioity to lime. 

 Becaufe in all the grofier fubftances, the phlogifttfn 

 iS allayed by fait, earth, and other matters : but, 

 in fixed air, it exifts in a purer, and confequently, 

 a more adive ftate. 



As alcalies are rendered mild, or cauftic, by 

 the prekoce, or abfence, of the inflammable prin- 



(;iple, 



