CALCULOUS AFFECTION. 167 
almost all over, and porous in some places, while in others it was 
chagrinie. It was thirteen centimetres in diameter, measured from 
the front to the back ; ten centimetres in thickness, eleven centi- 
metres in breadth, and one kilogramme in weight. It was composed 
of several layers, one over the other, and was thicker towards the 
exterior. In its centre was a soft foreign body, which appeared 
to serve as a kernel. 
On being analysed by Professor Lassaigne, to whom I have to 
render thanks for his courtesy, the following appeared to be the 
component parts : — 
Of 100 parts, Animal mucus .... 3,5 
Soluble saline constituents 6,0 
Carbonate of lime . . . 84,6 
Carbonate of magnesia . 4,4 
Sub-phosphate of lime . 1,5 
100,0 
So that we may easily convince ourselves by making comparative 
researches, that this stone has for its basis the same elements as 
those generally found in such calculi taken from the viscera of 
horses as have hitherto been analysed, with the exception of some 
very few trifling differences in the proportions. 
Post-mortem Examination . — The principal viscera were in a 
healthy state — the urinary organs alone presented any remarkable 
pathological lesions. 
The left kidney was hypertrophied, weighing more than three 
kilogrammes ; its cortical substance was thickened, hard, and fatty, 
and could not easily be divided ; while the tubular substance was 
infiltrated and softened, and had suppurated in several places : its 
pelvis was very much developed, and covered with an extremely 
thin membrane ; but, otherwise, presented no sensible alteration. 
The ureter passing from this kidney was about two centimetres 
in diameter — the mucous membrane with which it is lined, 
healthy. 
The right kidney was disorganized, had almost entirely disap- 
peared, and only weighed 192 grammes (q y . 9oz. 13 p. 16 gr.) : 
its indurated tissue was thickly sewn with calculous concretions, 
which could with difficulty be cut by a sharp instrument. Its pel- 
vis, in a manner speaking, no longer existed ; the ureter which 
proceeded from it was considerably developed, and more than five 
centimetres in diameter, the membranes of which it was composed 
being thickened and flesh-looking. Two very hard stones, with 
irregular sides, were found in the interior of this passage ; one close 
to its origin near the kidney, the other about three centimetres 
