108 Dr. Henri/ on Urinary Calcnli. [Feb. 



One effect of the delayed fulfilment of my purpose has been that 

 1 have been anticipated by other writers as to several of the facts 

 that had occurred to me. Some of these, however, it may still 

 be proper to state in general terms, as they furnish additional 

 evidence on points that have been the subjects of differences of 

 opinion. 



The urinary concretions from the bladder, which I have 

 examined experimentally, amount in all to 187. Of these, 34 

 were extracted by the late Mr. Ingham, of Newcastle-upon- 

 Tyne ; 35 by the late Mr. White, of Manchester ; 25 by Mr. 

 Hey, of Leeds ; 23, partly by the late Mr. Gibson, and partly by 

 Mr. Ainsworth, both of this town ; and the remaining 70 have 

 been given to me by surgical practitioners in this place,* and in 

 various parts of the kingdom, with the obliging view of facilitating 

 my inquiries. The number of the different varieties of calculi in 

 these several collections is stated in the following table, which 

 exhibits ihem in a sort of natural order, differing from the 

 chemical arrangement, which I have proposed in another place, 

 and which I still prefer for most of the purposes of classificution. 



Table I. 



Shoiviiig the Number of each Variety of Culrnlur, in several 



different Collections. 



From the preceding table, I have calculated the following, 

 exhibiting the proportion which each kind of concretion bears to 

 the whole number in the different collections. For example, in 

 Mr. Ingham's collection, the calculi consisting chiefly of uric 

 acid are to the whole number as one to one and two-tenths ; in 

 Mr. White's as one to one and eight-tenths, the second decimal 

 figure being omitted throughout as unnecessarily minute. 



• Especially by most of (he late and prevent surpoons of the Manchester Infirm- 

 ary ; an'l to Mr. KanMime, one of the surgeons of that charitv, 1 am indebted fur 

 dividing the calculi Ity a saw, without which division, collections of urinary con- 

 cretions can utl'ord no useful information. 



