On the Animal Calculus. 237 
in the Bladder than thofe of mod other Ci- 
ties. An Argument that Liquors contribute 
more to the breeding of the Calculus than 
our Food. Of which we have a further Proof 
in the Inftance of fmall Wines, which abound 
with Tartar^ and which are too well known 
to fubjed thofe who drink them to the Stone 
and Gout. 
Experiment XL 
I. T^HAT Waters are impregnated with 
X thefe tartarine Particles, more or left 
according to the different Nature of the fe- 
veral Strata or Beds of Minerals, Stone, 
which they percolate thro*, is evident from 
the following Experiments, viz. 
2. A cubic Inch of blue Clay being diftill- 
cd, a hundred and eight cubic Inches of Air 
were raifed from it, of which thirty fix Cubes 
loft their Elaftidty. This Clay does not fer- 
ment with Spirit of Salt. 
3. Three hundred and eighteen Grains of 
white Italian Marble being diftilled, little Air 
arofe, till it had a very great Heat, when two 
hundred and thirty four cubic Inches of Air 
were generated, of which fifty fix Cubes loft 
their Elaftidty in five Days, 4. And 
