[ 49 8 3 
refembling coarfe loaf fugar, when it firft concretes 
in a thick fyrup ; fome of which being dried on 
brown fpongy paper, became very white, and 
feemed to be made up of long, very fmall cryftals, no 
thicker than human hairs, and a faccharine matter. 
From this appearance, I judged that the fait was 
Fill mixed with a quantity of vifcid juices; and 
therefore I diluted the whole with a quart of New 
River water, depurated it again with the whites of 
eggs, and evaporated it to four ounces, which I fet 
in a cool place for eight days; and then, on examin- 
ing, I found that a cryftallifation had taken place, 
and I obtained above a dram of a pure neutral 
fait, made up of fmall, fquare, and cubic, and 
fmall narrow oblong parallelogram cryftals, re- 
fembling fomewhat in appearance thofe got from 
the juice of the mulberry, only the cryftals were 
lefs, as may be feen in fig. 12. 
After feparating this fait, I fet the remaining li- 
quor again in a land heat, and evaporated about 
half an ounce of it, and then put it for fome days 
into a cool place; and there formed a faline faccha- 
rine-like concretion, exa&ly fimilar to what was 
got in the firft trial. 
SECTION II. 
Of neutral Salts formed with fermented vegetable 
Acids , and the fojji l Alkali. 
Having {hewn a variety of neutral frits made 
with native vegetable acids, we come next to take 
a view of thofe made with fermented acids, and 
{hall begin with that produced from vinegar. 
E x p e- 
