2 6 Mr. kirwan’s Experiments and Obfervations on 
but Mr. home erg, in the Paris Memoirs for the year 1700, 
allures us, he diflolved mercury in marine acid, whole Ipecific 
gravity was 1,300, by keeping it fume months in digefiion. The 
authors of the Cours de Chymie de Dijon affirm alfo its folubility 
in this acid, though in very final 1 quantity. The dephlogilli- 
cated marine acid, in a vapourous hate, certainly acls upon it, 
though while in a liquid hate it is too weak, by reafon of its 
dilution. 
Precipitate, per Je 9 is alfo foluble in marine acid, with the 
abidance of heat. 100 grs. of fublimate corrolive contain 77 
of mercury, 16 of real acid, and 6 of water. 100 grs. of 
mercurius dulcis contain 86 of mercury, and 14 of acid and 
water. 
Zinc in vitriolic acid . 
100 grs. of zinc require for their folution 100 grs. of real 
acid, whofe proportion to that of water may be as 1 to 8, 10, 
or 22, applying heat towards the end, when the acid is almoft 
faturated. A frnall quantity of black powder always remains 
undiflolved. The prod u 61 of inflammable air is 100 cubic 
inches. It is foluble in the concentrated vitriolic acid, with the 
aid of .heat. 
100 grs. of vitriol of zinc contain 20 of zinc, 22 of acid, 
and 58 of water. 
The calces of zinc, if not exceedingly dephlogibicated, are 
alfo- foluble in this acid'. 
Zinc in nitrous acid. 
100 grs. of zinc require for their folution 125 grs. of real 
nitrous acid, whofe proportion to that of water is as 1 to 12, 
applying from time to time a flight heat. If a concentrated acid 
2 be 
