An AbJlraSiof a Treatife 0/ the Calculus Humanus in 
anfwer to feveral Queries propofed by Sir John 
Hofkins'^ by the Learned and Ingenious Fred. Slare 
M,D. and fellow of the Royal Society. 
*^ T is generally obfcrved by thofe that have been fubje<!l: 
i totho, Stone oi the Bladder^ that pains in the IQdmes 
we^antecedent, which intimates the foundatioa 
was fir^aid there, and afterwards by the Vretsers and 
aGu/ioi Vrine conveyed into the Bladder. The man- 
ner of its growth in the Bladder is obvious, the Vrtne 
( by fome called Lotium) being too highly fatiated or im- 
pregnated with a ponderous matter ( which we here de- 
fign to examine ) precipitates the fame at certain times 
upon the mention'd Bajis andalfo on the inward Superfi- 
cies or Coat o( thtB ladder, which upon a Relaxationpf 
their diftended Fibree, do foeftridtly embrace that prsB- 
ternatural fubftance it finds there, as to overlay it or 
cloath it with what ever Sediment fubfidedt here. That 
the Vrine only at fome Intervals is diipoled to let fall 
this matter, leems probable from this obfervation that 
the Concrete confifts of feveral Spherical Superficies , or 
round Incruftations , which like fo many diftind: Shells' 
.may be parted from each other. Moreover thefe Incru- 
ftations are obferved to be very unequal, iome much 
thicker then the other: An argument that the Vrtne 
continued much longer difpofed to depofe this Calcu- 
lous 
