296 ESSAYS anp OBSERVATIONS - 
fpirit. ..To make fulphur folable in water or 
{pirit of wine, it muft be-melted, then. mix- 
ed and incorporated, with a fixed alcaline 
falt, by which means it will moftly. difloive 
in warm water, and give a — and. {trong 
tincture to {pirit of wine. foltc: 
. Tus calx of lead, dtharge or miniuiny : dif- 
folve in diftilled vinegar; but mote fully and 
quickly in| aqua fortis diluted with, fix 
times its weight of water, The folution of 
lead in fpirit of vinegar, being evaporated 
flowly, to a due confiftence, and then remo- 
ved to a cool place, never fhoots into fair di- 
ftinét chryftals; -but ‘thickens, as it» were, 
into a’ faline’ mafs, like: -coarfe fugar, fome- 
what moift; and, with difficulty, «cam be 
brought to a ‘tolerable whitenefs: but the fo- 
lution in diluted: agua fortis, treated in the 
‘fame manner, gives large, folid, fhining, 
white chryftals, regularly fhaped, * The ca/x 
of lead or minium. will likewife: diffolve 
by digefting or boiling in oil of olives or lint- 
feed ; but as it diffolves, it thickens into the 
confiftence of an unguent or plaifter. 
| Goon aqua fortis or fpiritus nitri: will dif 
- folve about an equal weight of quick-filver, 
and the folution is performed with a great. 
commotion 
