[ 5 8 + ] 
It not improper to produce, at the fame time, fome 
other human calculi , for their further fatisfadtion, 
each of which was found fingle in the urinary blad- 
ders of different fubjedts. The lurfaces of thefe ftones 
may be obferved to be much fmoother than the fur- 
face of either of the four ftones, that were extradted 
from Mr. Woodhams’s bladder in the operation I 
have juft now recited ; and therefore it was more 
reafonable to expedt to find each of thefe ftones ac- 
companied with one or more ftones in the fame 
bladder (according to the received opinion), than it 
was to find more ftones than one in the cafe of Mr. 
Woodhams’s, which has given rife to thefe obferva- 
tions. 
But as the fadt before us does of itfelf fhew the 
impropriety and danger of determining from the fur- 
faces of fuch extraneous bodies, perhaps it may be 
thought needlefs to enlarge upon this fubjedt, to 
ftrengthen thofe precautions fo reafonable to be ob- 
ferved in this operation. However, as I have al- 
ready taken notice of the fmooth and poliflied ap- 
pearances of the furfaces of fuch ftones, as are pro- 
bably never found fingle in the bladder j I have pro- 
duced two ftones of this kind, that were extradted 
from the fame bladder, to fhew, that thefe ftones 
do no more refemble thofe ftones of Mr. Wood- 
hams’s, than a piece of polifhed marble can be faid 
to refemble a rough block of the fame fpecies. 
P. S. I am informed, by a letter from Suftex, 
dated the 1 Sth inftant, that Mr. Woodhams is 
perfedtly well in health ; that the whole of his 
urine had pafted through the urethra for the 
laft 
