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XXVI. Sequel to a paper on the tendency to Calculous Diseases, and on the 
Concretions to which such diseases give rise. By John Yelloly, M.D. F.R.S. 8 $ c . 
Read June 17, 1830. 
In a paper which the Royal Society did me the honour to publish in the last 
volume of its Transactions, I gave the analysis of 328 of the calculi contained 
in the cabinet of the Norfolk and Norwich Hospital ; but was prevented from 
extending my observations over the whole series of specimens, from the cir- 
cumstance of the remainder not being then divided. Since that period, how- 
ever, the division of the whole has been effected ; and I have therefore been 
able to complete the analysis, of which I have now the honour to lay the result 
before the Society. 
In my former paper I stated it as probable, that the proportions of the diffe- 
rent descriptions of calculi, which formed the undivided part of the cabinet, 
would not differ materially from that of those which I had analysed ; and this 
proves, in a considerable degree, to be the case. But it may be remarked, that 
some of the specimens which had been broken in the extraction, and whose 
interior had been considered as sufficiently exposed for the correct examination 
of all their laminae, were found to exhibit some slight differences in their 
centres, on a more complete division. 
I shall adopt the same plan which I pursued in my former paper, and present 
the results of the analysis in a tabular form, giving, in the order of their occur- 
rence from the centre, the consecutive deposits of the different materials of 
which the calculi are composed, according to the most prominent character of 
such material. I shall include in the Table, both those of the former, and the 
present analysis, amounting together to 663 specimens, in order to present, at 
one view, a summary of the chemical composition of the whole cabinet *. 
* I have placed in the cabinet, a book containing an outline of each calculus, with references ; and 
would also observe, that some of the facts stated in this communication, have been added since it was 
presented to the Society. 
3 H 
MDCCCXXX. 
