2 CO On the Animal Calculus. 
Drops, or any intermediate Number. 
14. I will now give a (hort Account of 
fame of the principal Experiments I made | 
in doing of which I did not confine myfelf to 
fuch mild Mixtures, as might probably not be 
injurious to the Bladder ; but chofe to begin 
with the ftrongeft fermenting Mixtures, iri 
hopes that if 1 fhould find any of thefe would 
diflblve the Calcuhs^ by gradually weakening 
and lowering fuch Mixture, I might poflibly 
bring it to fuch a Degree of Mildnefs, as might 
make it not injurious to the Bladder, and yet 
retain in fome meafure its dilTolving Quality. 
Or if I fliould not be fo happy as to fucceed 
fo far, yet I thought it moft: probable, that I 
might find Diffolvents, among thefe ftronger 
Mixtures, which might at leaft give fome far^ 
f:hcr Infight irito the Nature of the Calculus. 
Experiment IL 
I. A Cubic Inch of Oil of Vitriol, and dou- 
ble its Quantity of Water, when mixe 
together, made fo hot a Ferment that I could 
hardly bear to hold my Hand at the Bottom 
pf the Bolthead; yet it had no Effeft on a 
piece of the hardeft kind of Calculus. And 
