££ ON THE STRUCTURE OF CALCULI, 



Tery irregular, of a reddish brown colour, and covered with 

 minute crystals of the aminoniaco-magnesian phosphate. 

 On making a section of it, the internal structure exhibited 

 a radiated appearance, and was of a light brown colour. It 

 consisted of 



Phosphate of lime • • • • 45* 



Amraoniaco-magnesian phosphate •• 28* 



Animal matter 15. 



Carbonate of lime ] o* 



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* 



10Q- 



Calculi of the 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 co- 

 lour, and of the size just mentioned ; some of them have 

 the mulberry appearance. 



They consist of carbonate of lime and amimal matter, 

 which last substance retains the form of the calculus, after 

 it has been acted upon by diluted acids. 

 Of the sheep. 3> The sheep. 



A calculus from the kidney of a sheep was composed of 



Phosphate of lime • 72* 



Carbonate of lime 20* 



Animal matter 8* 



100- 



Of the rhino- 4. The rhinoceros. 



The urine of this animal is exceedingly turbid at the 



time it is voided, and when allowed to remain at rest, depo- 



sites a very large proportion" of sediment, which consists of 



carbonate of lime, with small portions of phosphate of lime 



and animal matter. 



5. The 



eeros. 



