C 633 ) 
time that being diflblved in three Tfioufand times its 
Weight of the fame kind of Liquor, fb inconfiderable a 
proportion of Salt was plainly difcoverable by our Pre- 
cipitant. 
But here Philofophical Candour forbids me to conceal 
an Objection that I made to my felf, though it be the 
chief, if not die only confiderable Scruple that occur'd 
to me, about our way of examining Waters. For I 
forefaw that it may be objected, that, whereas the Expe- 
riments hitherto mentioned have been try'd only upon 
Waters impregnated with grofs or corporeal Sea-Salt, this 
perhaps may not hinder, but that they may be imbued 
with the Spirits of Marine Salt, which by reafon of 
their adivity, may be as unhealthful to the Drinker, as I 
the grofler Salt it felf. But tho' to this Surmife I might 
anfwer, that a very fmall Proportion of Spirit of Salt, 
may in many cafes make the Water feafon'd with it, ra- 
ther Medicinal thanunwholfom 5 yet 1 lhall anfwer more 
diredly to the Objedion, by faying, that to manifeft 
it's not >eing well grounded, I took above a thoufand 
Grains of diftilfd Water, and, inftead of corporeal Salt, 
put to it one fingle drop of moderately Jirong Spirit of 
Salt, (for I had much Wronger by rne/ that I purpofely 
declin'd to employ) and having ftiak'd it into the Water, 
I let fall into a Portion of this unequally compos'd Mix- 
ture, fome drops of our Solution ot Silver, which prefent- 
ly began to precipitate in a whitiih Form ; infbmuch that, 
lor ought appear d to the Eye, this Trial fucceeded better, 
th&n if the Water had been impregnated with but athou- 
landth part of Corporeal Salt. The like Experiment was 
made with the Patentees Water inftead of the other. And 
to purfue this Trial a great way further, I had the Cu~ 
riofity to diftufe one drop of Spirit of Salt into two 
thoufand Grains of diftill'd Rain Water ; and upon letting 
fall fbme drops of our Precipitant into it, I found that 
the Succe&weUaniwerU my Expectation. And then. 
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