572 MORBID CONCRETIONS. 



which retained the shape of the concretion after the solution of 

 the phosphate of lime. In a salivary concretion weighing one and 

 a-half grain, examined by Dr Bostock, the whole consisted of phos- 

 phate of lime, except a few films of matter, which was consider- 

 ed as coagulated albumen.* In 1827, a salivary concretion was 

 subjected to a chemical analysis by M. Lecanu.f It weighed 

 7 grains, had an ovoid shape, was slightly wrinkled on the sur- 

 face, and was composed of two distinct concentric laminae, the 

 innermost of which was hard, compact, and gray, while the outer- 

 most was friable and perfectly white. Its constituents were, 

 Phosphate of lime, . 75 



Carbonate of lime, . 20 



Animal matter and loss, . 5 



100 



Laugier had previously found some carbonate of magnesia in 

 a salivary concretion. But no traces of that earth could be 

 found in the concretion analyzed by Lecanu. 



2. M. Lassaigne, in 1821, examined a salivary concretion 

 from a horse. :f It was an elongated ellipsoid ; and was compos- 

 ed of concentric coats, all seemingly of the same nature. Its 

 constituents were found to be, 



Carbonate of lime, . 84 



Phosphate of lime, . 3 



Animal matter, . 9 



Water, . 3 



In 1828, M. Henry, Junior, analyzed a salivary concretion 

 taken from the anterior jaw of a horse ten years of age. It 

 consisted of four distinct portions, and was accompanied by a 

 number of others about the size of a pea, all near the molar 

 teeth and along the zigomatic apophysis. It was ovoid, formed 

 by the union of four distinct portions, each of which was cylin- 

 drical and about an inch and a-half in length. It was smooth, 

 whitish externally, and, as it were, polished, internally very 

 white, but with sanguineous spots. It was very hard and form- 



* Nicholson's Jour. xiii. p. 374. f Jour, de Pharm. xiii. p. 626. 



\ Ann. de. Chim. et de Phys. xix. p. 1 74. Jour, de Pharmacie, xi. p. 465. 



