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fifteen years ago taken out of the Bladder of a child, after its death ; 

 the outfide of it was of an afli-colour, very fmooth, but under the 

 outfide fliell the whole Stone was as white as chalk, and, in fome 

 places, the faline particles of which it confilled glittered like frag- 

 ments of glafs. 



I at different times mixed the water in which the volatile and 

 fixed falts taken from thefe Stones had been infuied, with a fmall 

 portion of blood taken from my finger, and found the globules of 

 blood to be as it were diflblved or feparated into minute parts by 

 the mixture. 



An intimate acquaintance of mine, and a perfon of eminence in 

 this countiy, with whom I had formerly travelled, came to me in 

 a ftate of great pain, and complained, that now he was growing 

 in years he was greatly atBided with the Stone in his Bladder, and 

 afked me my opinion, whether any means could be devifed to dif- 

 folve or break it in pieces ; to which I replied, that I conceived 

 it to be impodible ; and I alfo told him, that he had contracted 

 this difeafe by his own manner of living. For, in our journies 

 together, he had beaded that he accuftomed himfelf to bear hun- 

 ger, thirfi, and cold ; and he alfo told me, that in hunting he only 

 held a fmall leaden bullet in his mouth, and by continually moving 

 it about, he could go for a whole day without drink, when others 

 could not difpenfe with it ; and to which I had re])lied, that while 

 we hold a leaden bullet in the mouth, its weight and coldnefs 

 caufes us to keep it continually in motion; and by the conllant 

 motion of the jaws, there is a continual fecretion of fpittle in the 

 mouth, which we fwallow, and thereby keep the throat moifi:, io 

 that we do not fo much require drink as other perfons, but ncver- 

 thelefs our bodies are not the lefs injured by the want of it. And 

 the moifture which is thus fvvallowed, and pafles through the 

 Kidneys, is very thick, and in fmall ((uantity, and more obnoxious 

 to the coagulation of falts and other particles of which the Stone in 



