214 ESSAYS anp OBSERVATIONS © 
THIS experiment was neceflary before 
the following, by which I propofed to in- 
quire into the truth of the firft propofi- 
tion fo far as it relates to quick-lime. 
Two drams of chalk were converted 
" into a perfect quick-lime, and loft two 
feruples and twelve grains in the fire. 
This quick-lime was flaked or reduced to 
a milky liquor with an ounce of water, 
and then diffolved in the fame manner, 
and with the fame acid, as the two drams 
of chalk in the preceeding experiment. 
Six drams, two {cruples, and fourteen 
grains of the acid finifhed the faturation 
without any fenfible effervefcence or lofs 
of weight. 
Ir therefore appears from thefe experi- 
ments, that no air is feparated from quick- 
lime by an acid, and that chalk faturates 
nearly the fame quantity of acid after it 
is converted into quick-lime as before. 
W1TH refpect to the fecond propofi- 
tion, I tried the following experiments. 
A piece of perfect quick-lime made 
from two drams of chalk, and which 
weighed one dram and eight grains, was 
reduced 
