2 20 On the Animal Calculus. 
Dr. Frederic Hoffman obferved of the ftony In- 
cruftadons in the Caroline Bath, which are hard- 
eft and redeft, but in leaft Quantity at the Mouth 
of the Spring when the Water is hotteft-, but 
as the Water grows cooler at a farther Di- 
ftance from the Spring Head, there the In- 
cruhation is greater in Quantity, -but fofter, more 
friable, and like Sand. Dijqnijiuo Phjfao* 
Medic a de Thermis Carolinis, 
7. Nature Teems to have given us a hint, that 
Toft mucilaginous Things are good to prevent 
the Growth of the Stone, by the Care flie has 
taken to line the Ureters and Bladder with the 
like Subftance, which is feparated from its 
Glands ; which ferves not only to prevent the. 
Bladder's being injured by the Acrimony of the 
Urine, but alfo to hinder the Adhefion of the 
tartarine Particles of the Urine, which are then 
found to adhere to the Bladder, when this 
mucilaginous lining is by the Calcnlus rubbed 
oft : And a Calculus Sand is fometimes found 
adhering to the whole Subftance of the Blad- 
es 
der, which grows thereby thick, hard and 
fehirrous. And daily Experience teaches us 
that the Tartar of Urine conftantly adheres 
to Urinals and other Veflels it is contained in ; 
and v/ould doubtlefs do the Tame to the Subr 
ftance 
