[ 6 53 ] 
Experiment 2 . 
Solutions of platina, evaporated by a gentle warmth, 
to a proper pitch, and then fet to fhoot, yielded cry- 
fials, of a dark, almoft opake, red colour, in form of 
leaves, like flowers of benzoin, but thicker. The 
cryHals, wafh’d with proof fpirit, became fomewhat 
paler, but Hill remain’d of a high colour, refembling 
the deeper chives of faffron. Expos’d to the fire, 
they feem’d to melt, emitted white fumes, and at 
length fell into a dufiky afh-colour’d calx. 
Experiment 3. 
Solutions of platina, dropp’d upon hot marble, 
immediately corroded it ; but did not, like folutions 
of gold and fome other metals, communicate any 
colour. Nor did they give any Ham to the fkin, to 
feathers, ivory, or other like animal fubftances, which 
liquors containing gold tinge purple. 
Experiment 4. 
As a minute proportion of gold contain’d in li- 
quors is difcoverable by their ftriking a purple colour 
with tin. 
1 . Some bright plates of pure tin were put into a 
folution of platina diluted with water. The plates, 
in a little time, look’d of a dark olive colour, and 
foon after were cover’d with a redifh brown matter 5 
The liquor became at firft darker colour’d, and after- 
wards by degrees, as the precipitate fell, nearly cc~ 
lourlefs ; without exhibiting the leaflt appearance of a 
purplilh hue. 
z. Pla- 
