Seventific Intelligence. 191 
Uric acid, - - - ~ - - 7 
Uric acid, covered with one or more fusible coats, - 9 
Urate of ammonia, - - - 1 
Fusible calculi, without a distinct nucleus - - z 
Phosphate, with a considerable proportion, (0.13) of carbonate 
of lime, é 
One remarkable fact is the variety in Wirtemberg of calculi form- 
ed of uric acid, if the number of them be compared with that which 
is generally found in England. M. Rapp has found seven out of 81 
in his collection ; while in the collection of Guy’s Hospital in Lon- 
don, 22 are met with among 87; at Norwich, 66 out of 181 (Mar- 
cet); at Manchester, 71 out of 187, (Henry,) without counting 39 
others, composed of uric acid and of phosphate ; of 150 calculi, in 
Hunter’s Museum, and in the collection of Sir E. Home, there are 
61 formed of Uric acid, including 45 containing a small proportion of 
phosphate (Brande.) In the collection of Bristol, Smith found 73 
calculi of uric acid, out of 218, the total number. 
Calculi of uric acid are not, therefore, common in Wirtemburg ; 
this substance, however, is the most generally diffused throughout 
them. M. Rapp counted fifty seven of which only the nucleus was 
formed of it. ‘This nucleus is frequently very small, sometimes only 
a line in diameter ; in many of these concretions the oxalate of lime 
is mixed with uric acid; sometimes, but rarely, coats of uric acid 
alternate with coats of phosphate. ae 
M. Rapp found no stone composed entirely of phosphate of lime, 
but frequently this salt was mixed with ammonia ian phos- 
e. ‘The phosphated earths form but rarely the first nucleus of a 
Stone ; most frequently they form the external coats when the nu- 
cleus is already formed. This is frequently observed in mulberry 
uli ; occasionally, a certain quantity of carbonate of lime whack 
ed with the phosphates. ‘These calculi may be formed without any 
Particular diathesis, and in a man in good health, whenever any €x- 
traneous body get into the bladder, they become the most mind 
ous calculi. Earle described one (Phil. Trans. 1807,) that weighed 
four ounces. An animal regimen appears singularly favorable to the 
sition of phosphated earths in the urine. pts 
aes esi of urate of ammonia in urinary calculi has been con~ — 
tested by M. M. Brande, Henry, and Marcet; and the signs which 
Prout has indicated, to recognise this salt, are~all doubtful. M. 
