i p 8 Analyfis of the Air, 
and Vegetables, is by the fame attra&ive 
power apt fonietimes to form anomalous 
concretions, as the Stone, &c. in Animals, 
efpecially in thofe places where any animal 
fluids are in a ftagnant ftatc, as in the U- 
rine and Gall Bladders, they ftrongly ad- 
here alfo to the fides of Urinals, &c. The 
like tartarine concretions are alfo frequently 
formed in fome fruits, particularly in Pears 5 
but they do then efpecially coalefcein great- 
eft plenty, when the vegetable juices are 
in a ftagnant ftate, as in wine vcfiels, &c. 
This great quantity of ftrongly attraft- 
ing, unelaftick air particles, which we find 
in the calculus , fhould rather encourage 
than difcourage us, in fearching after fome 
proper diflblvent of the Stone in the Blad- 
der, which, upon the analyfis of it, is 
found to be well ftored with aftive princi- 
ples, fuch as are the principal agents in 
fermentation. For Mr. Boyle found there- 
in a good quantity of volatile fait, with 
fome oil , and we fee by the prefent Ex- 
periment, that there is ftore of unelaftick 
air particles in it. The difficulty feems 
chiefly to lay, in the over proportion of 
fhefe laft mentioned particles, which are 
firmly united together by fulphur and fait j 
