306 ESSAYS asp OBSERVATIONS 
vedin water, and if fpirit of wine, a liquor 
fpecifically lighter than water, is added to 
the folution ; no precipitation will enfue. 
Wuew filver is. diffolved in. good aqua 
fortis, ‘the folution,. may be diluted. with fair 
water to any degree you pleafe ; yet the par- 
ticles of filver continue fufpended in the li- 
quor, tho’ rendered fpecifically lighter : 
whereas, when the. thineft and lighteft parts 
of the folvent are carried. off by evaporation, 
the filver falls down... In the fame manner, 
a folution of quick-filver in agua fortis, a fo- 
lution of gold in: agua regia, of lead in fpirit 
of vinegar, and fome other folutions of ,me- 
tallic fubftances, may be diluted: with fimple 
water without precipitation. Further, fome- 
times a liquor fpecifically heavier than the 
folvent is added to the folution, whereby the 
fpecific gravity of the compound. liquor is 
increafed ; yetthe particles of the diflolved bo- 
dy are no longer fufpended in. it, but fall to 
the bottom, quite contrary to. this hypothe- 
fis. When rofin of jalap is diflolved. in high- 
ly reQified {pirit of wine or alcohol, if water, 
which is fpecifically heavier than the fpirit, 
is poured in, the ,refinous particles can no 
longer be fuftained. The fublimate corrofive 
mercury 
