j p6 Analjfis of the Air. 
oil in the diftillation of thefe Stones, than 
from the Calculus , part of which oil did, 
arife from the Gall, which adhered to and 
was dried on the furfaces of the Stones, 
which oil formed large bubbles, like thofe 
which arofe in the diftillation of Deer's 
Horn, p. 187. 
A fmall Stone of the Gall Bladder, which 
was as big as a Pea, was dififolved in a Lix- 
ivium of Sal Tartar in feven days, which 
Lixivium will alfo diffolve Tartar j yet it 
will not diffolve the Calculus, which is more 
firmly united in its parts. 
A quantity of Calculus equal to one half 
of what was diftilled, viz. 115 grains, did, 
when acubick inch of fpirit of nitre was 
poured on it, diffolve in 2 or 3 hours, with 
a large froth, and generated 4 8 cubick inches 
of air, none of which loft its elafticity, tho* 
it flood many days in the glafs veffel. (Fig e 
34.) And a like quantity of Tartar being 
mixed with fpirit of nitre, was in the fame 
time diffolved, but no elaftick air was ge- 
nerated, notwithftanding Tartar abounds fo 
much with air. 
Small pieces of Tartar and Calculus were 
in 12 or 14 days both diffolved by oil of 
Vitriol 5 the like pieces of Tartar and Cal- 
z cuius 
