580 MORBID CONCRETIONS. 



Lassaigne examined some pulmonary concretions taken from 

 the lungs of a cow labouring under Phthisis pulmonalis. They 

 had the form of small white grains, very hard, and united toge- 

 ther by a mucous membrane. They consisted of phosphate of 

 lime, mixed with a little carbonate, and deposited in the mem- 

 brane.* 



3. Hepatic concretions. The liver also is sometimes full of si- 

 milar bodies. The shape of the hepatic concretions, as far as 

 my observations go, is more irregular, and I have seen them of 

 greater size than the pulmonary concretions. By my analysis, 

 they are composed of phosphate of lime and a tough animal mem- 

 branous matter*. 



4. Concretions in the prostate. From the experiments of Dr 

 Wollaston we learn that the concretions which sometimes form 

 in the prostate gland have phosphate of lime for their basis. 



5. Concretions in the lachrymal sack. According to Fourcroy 

 these concretions, which are very rare, consist of phosphate of 

 lime cemented by a gelatinous matter.f 



CHAPTER VI. 



6F INTESTINAL CONCRETIONS. 



CONCRETIONS of very considerable size are occasionally found 

 lodged in the stomach and intestines ; seldom indeed in the hu- 

 man body ; but more frequently in some of the inferior animals. 

 Some of these bodies have acquired great celebrity under the 

 name of bezoars. It will be proper to state, in the first place, the 

 facts ascertained respecting concretions found in the human in- 

 testines. 



Dr Monro secundus, while Professor of Anatomy in the Uni- 

 versity of Edinburgh, made a pretty large collection of intestinal 

 human calculi, which are still preserved in the Museum of the 

 Anatomy Class. There are a few similar ones among the collec- 

 tion of calculi in the Hunterian Museum of Glasgow, and Dr 

 Marcet informs us that Dr Bostock showed him a similar con- 



* Ann. de Chim. et de Phys. ix. 328. 



f Mem. de Hnstitut. T. iv. as quoted by John, Tabellen des Thierreichs, p. 46. 



