PHLEBOLITES. 447 



precipitate, and on adding an excess of water of ammonia to it, gelati- 

 nization took place. 



" The inicrocosniic salt threw down no precipitate ; and the hydro- 

 sulphate of ammonia caused no discolouration, proving the absence of 

 the metallic oxides. 



" The inference deducible from the above analysis is, that the con- 

 cretion consists of animal matter nearly one-half, the remainder being 

 the phosphate and the carbonate of lime. 



" Grnelin subjected some phlebolites taken from the human subject 

 to analysis, and found them to consist of, 



Animal matter . . . . . 27.5 

 Phosphate of lime ... 53.5 



Carbonate of lime .... 15.5 

 Magnesia and loss . . . . 3.5 



100 



"He could not refrain from expressing his concurrence with the 

 view Dr Carswell had taken of the formation of these bodies, which is, 

 that they have their origin in the coats of the vein ; and he thought the 

 concretions adverted to by the President at the last meeting were very 

 likely to be phlebolites in the early stage. 



" It was the structure of these vein-stones that more particularly in- 

 duced him to come to this conclusion. The one laid open by Mr Sim- 

 onds shews a series of layers, but not around a common centre, which 

 he thought would be the case if they were formed directly from the 

 blood; but these layers of animal matter are superposited one upon 

 another, and the outer one, that which is in contact with the mem- 

 brane enclosing the mass, has much the greatest quantity of earthy 

 matter in it. He also considered them to possess organization, al- 

 though in a very low degree, and once to have had peduncles by which 

 they were attached to the vein, although certainly not a vestige of any 

 is now to be seen. Their shape also favoured this view, as well as the 

 position of the lamellae." 



CAPILLAEIES CAPILLAKY HAEMORRHAGE. 

 Just as the arteries and veins are occasionally injured, and 

 blood flows from them, so wounds of the capillaries lead to 

 haemorrhage, which soon ceases spontaneously, or is stop- 



