OF FOSSILS. 267 



Actable alkali with iron ; of the muriatcd vcgcta- 

 \)\>. alkali with platnu.m; of the variolated vo- 

 latile alkali \\itli ci'^ptr; of the muriatcd vola- 

 tile alkali with platinum, quicklilver, copper, 

 and iron; of vitriohitedand acctated quickiiiver 

 with iron ; of vitriolatcd iron with magnciium, 

 with copper, and with /.inc. 



c x x v 1 1 1 . Quadruple met a Ulc Salts. 



THE quadruple metallic fairs are formed by 

 the union of ial an.nu-niac \\ith nitrated iron, 

 with nitrated copper, ar.d \\ithboracicquick- 

 filvcr; of the viuiol of iron, likewite, with the 

 vitriols of copper and ^inc together. 



{ cxxix. Alkaline metallic Salts. 



MOST of the alkalis alfo combine readily with 

 metals, efpecially the volatile alkali; which 

 fometimes forms beautiful cryllals, with a me- 

 tallic bafe, as with iilver and copper. The nu- 

 merous family of thefe falts are dcfcrving of 

 mucli greater attention than has ever yet been 

 paid to them. 



ex xx. Synopjts of Salts. 



FROM what has been faid, I am of opinion, 

 there can be no doubt of the extcuiive 'influence 



and 



