on the Campojitim of James’s Powder. 363 
exp. ix. (ff) Needle-like cryftals of Algaroth, powder dif- 
folved readily and totally in about thirty times their weight of 
marine acid. 
( [b ) Part of the fame parcel of cryftallized Algaroth pow- 
der was calcined for above two hours, during which time it 
was expofed to as great a heat as it would bear without melting, 
and during which time it was conftantly raked about. Nearly 
half of this calcined calx readily diffolved in marine acid, 
and by boiling the remainder in a proportionally much greater 
quantity of the fame acid, great part of it was diffolved, and 
the fmall part which ftill refilled folutiori could not be diffolved 
in above 100 times its quantity of hot aqua regia. This indif- 
foluble part afforded regains with tartar by means of heat 
applied with the blow- pipe. 
(b) White flowers of antimony generally left a refiduum 
that was either infoiubie, or diffolved with great difficulty, and 
in a fmall proportion, in marine acid or aqua regia ; yet this 
refiduum was reducible. Some parcels of this calx totally 
diffolved. 
( d ) A little of the antimony, long calcined in a former 
experiment, and afterwards melted into a yellow mafs, 
Exp. 8 . (^), would only partially diffblve in marine acid 
and aqua regia ; but the copious refiduum it left was reduced. 
(ri) Equal weights of cryftals of Algaroth powder and cal- 
cined bone mixed together, diffolved totally and readily in ma- 
rine acid. This (hews, that difengaged phofphoric. acid does 
not precipitate antimonial calx when marine acid is prefent. 
(f) The calx dntimonii nit rat a of the Edinburgh Difpenfa- 
tory, argentine flowers of antimony, hyacinthine glais of 
antimony, and calx precipitated from antimonial tartar by alkali 
of tartar, all diffolved readily and wholly in marine acid ; but, 
B b b 2 {g) Dia- 
