156 Salt of Tartar. 
f , 
naked at their firfi: Shooting, but appear 
foon after covered with little Leaves or 
Tufts; the minute Bodies above mentioned 
which rife near the Twigs being attracted by 
and adhering to them. 
But the mod; odd and lingular Circum- 
flance in the Shooting of this Salt is, that 
ilrait Lines appear, two and two, inclining 
toward each other from the Edge of the 
Drop where they begin to fhoot, but never 
meeting fo as to form a Point, though fome- 
times they extend almofl acrofs the Drop, 
<vid. e. — They may pofiibly be cylindric 
Tubes, but of that I am not certain. 
The Humidity of the Air foon puts an 
End to all thefe Configurations. 
Crude Tartar, calcined, difiblved in warm 
Water, purified by Filtration, and evaporated 
to a Drynefs, becomes what is ufually called 
Salt of Tartar: which Salt tied up in a Cloth, 
and hanged in a damp Place, attracts the 
Moifcure of the Air, and liquifies in fuch 
Manner, that from one Pound thereof there 
will drop down double its Weight of what 
is termed Oil of Tartar per deliquium: but 
inftead of this the Shops frequently fell * 
Pearl Afhes liquified by the Air, which they 
reckon equally ufeful for the fame Purpofes. 
Some likewife imagine there is no Dif¬ 
ference in the medicinal Virtues of the Salt 
? Pearl Allies are a pure Sort of Pot- Aft. 
of 
