Analyfis of the Air. rpj 
By comparing this diftillation of the cal- 
culus with that of Renijh Tartar, in Ex- 
per. 7 h we fee that they both afford more 
air in diftillation, than any other fubftances: 
And it is remarkable, that a greater propor- 
tion of this new raifed air from thefe two 
fubftances, is reforbed, and lofes its elafti- 
city, inftanding a few days, than that of any 
other bodies $ which are ftrong fymptoms 
that the calculus is a true animal Tartar . 
And as there was very confiderably lefs oil* 
in the diftillation of Renijh Tartar t than 
there was in the diftillation of the Seeds and 
folid parts of vegetables 5 fo I found that 
this calculus contained much lefs oil than 
the blood or folid parts of animals. 
I diftilled in the fame manner as the a~ 
bove mentioned calculus, feme Clones taken 
out of a human Gall Bladder, they weighed 
5 2 grains, fo their bulk was equal to 4 part 
of a cubick inch, as I found by taking their 
fpecifick gravity. There was 108 cubick 
inches of elaftick air raifed from them in 
j diftillation, a quantity equal to 648 times 
their bulk 5 much the fame quantity that 
was raifed from the calculus . About 4 part 
of this elaftick air was in four days reduced 
into a fix'd ftate, There arofe much more 
O 2 oil 
