234 Mr. W. Brande on the Differences 
A very large calculus, from the kidney of a horse, was 
composed of 
Phosphate of lime - - 7 6 
Carbonate of lime 22 
98. 
B. From the bladder. 
This calculus was also of a large size, its weight when per- 
fectly dry, nine ounces and a half, its external surface very 
irregular, of a reddish brown colour, and covered with minute 
crystals of the ammoniaco -magnesian phosphate. On making 
a section of it, the internal structure exhibited a radiated ap- 
pearance, and was of a light brown colour. It consisted of 
Phosphate of lime - - 45. 
Ammoniaco-magnesian phosphate - 28. 
Animal matter - - 15. 
Carbonate of lime - - 10. 
98. 
In another case the bladder of a horse was found to be 
nearly full of sand, the composition of which was as follows : 
Phosphate of lime - - 60. 
Carbonate of lime - - 40. 
100. 
2. The Ox. 
A number of small calculi from the size of a pea down- 
wards, are not unfrequently found in the bladder of the 
ox. Those in the Hunterian Collection are of a pale brown 
colour, and of the size just mentioned ; some of them have 
the mulberry appearance. 
