C 325 ] 
gallons of this fea« water, as foon as I had received’ 
it, into the ftill j and when it began to diftil, air was 
blown up through it. For fome time, as is ufual, in 
the diftillation of fea- water, no fpirit of fait arofe ; 
but after diftilling fome time longer, there were 
very weak whitifh clouds, with drops of folution 
of lilver in aqua-fortis, as in the common way of 
diftilling. Hence we fee, that ventilation does not 
increafe the quantify of fait, but rather probably 
fomewhat decreafes it, for the reafons given, N® 24. 
27. I diftilled three gallons of fea- water, which 
had /flunk, and became fweet again j when about 
ten quarts of it had been dihilled off, then there be- 
gan to be very weak whitifh clouds with folution of 
filver, but none with folution of mercury j which 
fhews the water to be hitherto good, agreeably to 
what I formerly had found to be the good effedl of 
diflilling fea-water, which had putrified, and be- 
come fweet again j of which I publifhed an account 
in the year 1739- But when 1 continued the diflil- 
lation on, a quarter of an hour longer, viz. till there 
was but a pint of water remaining in the flill, ajid- 
the falts were incrufled on its fides, up near three 
inches from the bottom, and lay in heaps at the bot- 
tom of the flill, then the diflilled liquor had whitifh 
clouds in it, with the folution of mercury in aqua- 
fortis. From this diflillation we fee, that putre- 
fadlion, by diffolving the bittern fait and bitumen, 
into very minute parts, qualified them to combine 
with the more fixed common fait, fo as to detain.- 
them from rifing in diflillation. 
28. I diflilled three gallons of fea-water, with the-' 
proportion of fix ounces of Mr. Appleby’s lapis in- 
fern alls, s 
