48 Mr. Henry on the Prefers at ion 
EXPERIMENT IX. 
Thefe proportions of Chefhire fait, quicklime, 
and rain water, being mixed, and fuffered to ftand 
afufficient time, the filtered liquor exhibited no 
figns of being impregnated with unneutralifed 
lime: but, on adding a few drops of lixivium 
tartari, it inftantly became very turbid, and de^ 
pofited a fediment, which, inftead of difappearing 
on the addition of vitriolic acid, formed a fele- 
nite with it, and again fettled at the bottom of 
the glafs. 
EXPERIMENT X. 
Five grains of quicklime, being added to the 
mixture of the ninth experiment, and the liquor, 
after due time, being filtered, and fubje&ed to 
the ufual teft, exhibited evident marks of having 
become a lime water. 
I now began to fufpedt, that the portion of 
quicklime, added to the fea water, in the firft 
experiment, had not been fufficient to precipitate 
the whole of the magnefia from its acid, and 
having fome of the mixture of that experiment 
(till by me, I again turned my attention to it. 
EXPERIMENT XI. 
The remaining part of the fea water, to which 
the quicklime had been added, was about a pint 
and half. Lime water, being added to a fmall 
part 
