ON THE STRUCTURE OF CALCULI. 4£ 



5. The dog. Of the dog. 



A large calculus from the bladder of a dog twenty years 

 old, weighing sixteen ounces, was extremely hard, and of a 

 gray colour ; when cut through, it exhibited a nucleus about 

 the size of a hazel nut, partly made up of concentric layers 

 of phosphate of lime, and partly of crystals of the amino* 

 niaco-magnesian phosphate. The part of the stone sur- 

 rounding the nucleus consisted of 



Phosphate of lime • 64* 



Ammoniaco-magnesian phosphate • • 30' 

 Animal matter 6' 



100' 



Sand taken from a dog's bladder was of a gray colour, 

 and contained 



Carbonate of lime ......••••• 20* 



Phosphate of lime 80* 



100* 



6. The hog. Of 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 internal structure was uniform, .and there was no appear- 

 ance of a nucleus. It was composed of 



Carbonate of lime* •••.....• go* 



Animal matter io» 



^100- 



7. The rabbit. Of the rabbit 

 A calculus from the rabbit's bladder weighing four 



drachms, was of a dark gray colour, and appeared as if com- 

 posed of several smaller calculi. It consisted of 



Phosphate of lime 39* 



Carbonate of lime 42» • 



Animal matter . • • 19* 



100« 



Sect. 



