198 On the Animal Calculus. 
thofe which are of a lefs compaft Texture • 
cfpccially the Gravel Stones, which are noc 
generally fo hard, as Stones which have had 
a longer time to harden in the Bladder 5 yec 
I have met with fome of thefe Gravels fo hard 
as not to be diflblved by this Mixture. 
12. Tho* I have noc herein fucceeded fo 
far, as to encourage any one to attempt the 
diflblving therewith Gravel Stones in the Blad- 
der: Yet I thought it might noc be improper 
to give an Account of the (mail Progrefs I had 
made herein 5 fince it might polTibly be a Step, 
towards the happy and important Difeovery, 
by exciting and engaging others in the fame 
Purfuit; who among the infinite Variety of 
Menftruums that may be compounded, may 
haply hit upon fome, which may more ea- 
fily difTolve moft Gravel Stones at lead:, if noc 
the larger and harder Calculi. If we could 
make no farther Advance than this, it would 
be of confiderable Benefit to Mankind, by 
taking away, when it firfl: falls into the Blad- 
der the Nucleus on which larger and harder 
Scones are in time formed. And this would 
be effeded, if with a few Injedions of a fafe, 
and proper Mendruum, we could only diflblve 
a fmall part of a large Gravel Scone, lately 
fallen 
