324 THE CONTAGIOUS TYPHUS 



had anticipated, Lad generated calculi of 

 various chemical composition. 



These unfinished inquiries concerning com- 

 parative pathology, thus interrupted in spite 

 of myself, might, had circumstances allowed 

 them to reach the goal, have authorized us to 

 undertake in man the dissolution of stone in 

 the bladder. And how would this have been 

 effected ? By seizing the stone between the 

 two ends of the catheter with the double 

 current, and by injecting a well-sustained series 

 of dissolvents into the patient, whilst lying at 

 his ease in a recumbent posture. 



Nor is this all. They would likewise, I 

 believe, have thrown some light on the organic 

 production of calculi, on the lithic diathesis, 

 and the particular formation of the stone ; and 

 led us, in some degree, to their preventive 

 treatment, which is always superior to the 



curative remedv. 



/ 



On a subsequent occasion, I betook myself 

 to my task under more favourable conditions. 

 I undertook at Alfort, conjointly with Pro- 

 fessor Delafond, a course of experiments on 

 the cutaneous diseases of animals in relation 

 to comparative pathology, having already, 



