Glaubers Salt. • 153 
in the Figures {hewn at b: but if only a 
fmall Degree of Heat be employed, it forms 
many very tranfparent Parallelograms, fome 
having one, and fome more of their Angles 
fecanted, as at c. 
This Salt is a Mixture of Nitre and Sul¬ 
phur in equal Quantities, fet on fire in a 
Crucible by a Spoonful at a Time, after¬ 
wards diffolved in warm Water, filtered and 
evaporated. It purges by Stool and Urine. 
CHAP. XXVIII. 
Glauber’s Salt. 
A FTER the Diflillatioft of Spirit of 
Salt with Oil of Vitriol , (from Oil of 
Vitriol, common Salt and Spring Water in 
equal Quantities;) what Salt remains at the 
Bottom of the Retort, being diffolved, fil¬ 
tered, evaporated, and cryflalized, is called 
Glauber s wonderful Salt. 
A Drop of Water faturated with this Salt, 
and gently heated over a Candle, produces 
Ramifications from the Side of the Drop, 
like the Growth of minute Plants, but ex¬ 
tremely tranfparent and elegant, in the Man¬ 
ner fhewn at c , Plate V. Some of them 
however begin to fhootrroma Center at fome 
Diftance from the Edge, protrude Branches 
from 
1 
