1 9 8 dnalyjis of the Air. 



getables, are by the fame attractive power apt 

 ibmetimes to form anomalous concretions, 

 as the Stone, &c. in Animals, efpecially in 

 thofe places where any animal fluids are in 

 a ftagnant ftate, as in the Urine and Gall- 

 Bladders; they ftrongly adhere alfo to the 

 fides of Urinals, &6. The like tartarine con- 

 cretions are alfo frequently formed in fome 

 fruits, particularly in Pears; but they do then 

 efpecially coalefce in greateft plenty, when 

 the vegetable juices are in a ftagnant ftate, as 

 in wine veffels, &c. 



This great quantity of ftrongly attracting, 

 unelaftick Air particles, which we find in the 

 calculus, mould rather encourage than dis- 

 courage us, in Searching after fome proper 

 difiblvent of the Stone in the Bladder, which, 

 upon the Analyfis of it, is found to be well 

 ftored with active principles, fuch as are the 

 principal agents in fermentation. For Mr. 

 Boyle found therein a good quantity of vola- 

 tile fait, with fome oil ; and we fee by the 

 prefent Experiment, that there is ftore of 

 unelaftick Air particles in it. The difficulty 

 feems chiefly to lie, in the over-proportion 

 of thefe laft-mentioned particles, which are 

 firmly united together by fulphur and fait; 



the 



