%g 6 Mr. W. Brande on the Differences 
Carbonate of lime 
20. 
Phosphate of lime 
80. 
100. 
6 . The Hog. 
A calculus from the bladder of this animal weighed nine- 
teen drachms ; it was of a pale gray colour inclining to white, 
and so hard that it was with difficulty cut through. Its in- 
ternal structure was uniform, and there was no appearance 
of a nucleus. It was composed of 
Carbonate of lime 
90. 
Animal matter 
10. 
100. 
7. The Rabbit. 
A calculus from the rabbit's bladder weighing four drachms. 
was of a dark gray colour, and appeared 
several smaller calculi. It consisted of 
as if composed of 
Phosphate of lime 
39 - 
Carbonate of lime 
42. 
Animal matter 
^ 9 - 
100. 
SECTION VI. 
General Inferences. 
It appears from the preceding .observations, that calculi 
formed in the kidnies, and immediately voided, are almost 
always composed of uric acid ; and that the phosphates are 
very frequent ingredients in calculi of the bladder, more 
especially in those, which, from their situation, have been ex- 
posed to a continual current of urine : they also uniformly are 
