458 MORBID PRODUCTS. 



I now proceed to give one or two analyses of human calculi 

 as illustrations of their general character. 



I analysed the remarkable calculus alluded to in pp. 439 and 

 449. I examined, 1st, the external layer ; 2d, the inner, tuber- 

 culated nucleus; and 3d, the minute round nucleolus. I have 

 likewise analysed (4th) a calculus of uric acid. 



Anal. 160. An. 161. An. 162. An. 163. 



Cortex. Nucleus. Nucleolus. Uric acid calculus. 



Water . . . 24-5 10-0 3'7 3'0 



Solid residue . . 75-5 90-0 96'3 97'0 



Earthy phosphates . . 70 - 5 I'l 



Oxalate of lime . . 76-1 



Uric acid . . 91'2 92-8 



Alkaline urates . . 1-0 0-5 1-3 3-2 



Animal matter . . 3-5 12'8 3'5 



Fat and extractive matter a trace a trace 1*0 



The animal matter in the cortex contained a little silica and 

 peroxide of iron ; and in the nucleus, a large quantity of dark 

 brown colouring matter. 



Uric acid calculi contain : 



According to 



Taylor. Joss. Laugier. Von Bibra. 



Uric acid . . 60-0 70-0 10-0 



Urate of ammonia . . 40-0 9-03 



Urate of lime . . 10'3 



Phosphate of lime . .10-0 



Amtnoniaco-magnesian phosphate 20-0 1-12 



Phosphate of ammonia . 5'0 



Oxalate of lime . . 15-0 0*95 



Ammoniacal matter and water 10-0 19'0 20-0 1-80 1-60 



A suhstance soluble in ether . 0-5 0-81 0-50 



alcohol 0-41 



Calculi in which the earthy phosphates and carbonates pre- 

 dominate have been analysed by Fromherz and Lindberson : 



Fromherz. Lindberson. 



Carbonate of lime . . . 9 TO Urate of soda . . . 9*77 



Phosphate of lime . . .3-0 Basic phosphate of lime . . 34-74 



Albumen and fat . . . 4'0 Ammoniaco-magnesian phosphate 38'35 



Carbonate of lime . . . 3' 14 



Carbonate of magnesia . . 2-55 



Albumen 6'87 



