G8 



concretions , which he jocosely called his turquoises, 

 are an excessively rare phenomenon. A year after, 

 I saw again a few blue gall-stones, evacuated by a 

 Russian field-officer, who, during the campaign in 

 Persia, caught a most obstinate intermittent fever, in 

 consequence of which he was sent to Carlsbad. Those 

 blue concretions drew the attention of many eminent 

 physicians 5 unluckily no analysis took place, but all 

 sorts of conjectures were hazarded on the origin of 

 that colour, amongst others an ingenious one, pro- 

 posed by a learned Saxon gentleman , founded upon 

 the presence of copper , which analytical researches 

 have proved to exist in several articles of our daily 

 vegetable and animal food. [Almanack for 1833, 

 ch. V.). The celebrated J. G. Walter, of Berlin, 

 collected innumerable gall-stones, described, after his 

 death, by his son Frederick- Augustus, in the Ana- 

 tomisches Musaeum, I. Th. Berlin. 1796. Some blue 

 ones are to be seen , Plate II et IV. 



The most extraordinary case of biliary concretions 

 expelled by the action of our waters, has been pub- 

 lished by Dr. Leo (f 1729), with the analysis of 

 those concretions by Dr. Pleischl, professor of che- 

 mistry at Prague , under the title of Merkiciirdige 

 Kranhengeschichtc einer Gallenstein - Kranken , nebst 

 der chemischen Analyse und Abbil dung dieser Gallen- 

 sleine und des krystallisirten Cholestrms. Prag, 1826. 

 Every one of the four biliary calculi, evacuated at 

 Carlsbad by Leo's patient, a Saxon lady, sixty -five 

 years of age, are, according to the very correct 



