324 SOLID PARTS OF ANIMALS. 



The alcoholic solution had a disagreeable smell, which the al- 

 cohol distilled from it retained. When evaporated to dry ness, 

 it left a dark-brown viscid mass easily soluble in water, not pre- 

 cipitated by acids, but by infusion of nut-galls, trisacetate of lead, 

 corrosive sublimate, and nitrate of silver. They considered this 

 substance as osmazome. 



The portion from the solution in cold water which the boiling 

 alcohol had left undissolved had a pale-yellow colour, and was 

 soluble in water. They considered it as salivm mixed with a little 

 casein. But they do not give us the characters which induced 

 them to draw this conclusion. 



The portion of liver which was insoluble in cold water was next 

 treated with boiling water, The decoction had a light-yellow 

 colour. It was evaporated to dryness, and the residue treated 

 with hot alcohol. The alcoholic solution, on cooling, deposited 

 some flocks of casein. It was evaporated to dryness, again dis- 

 solved in hot water, and the solution treated with trisacetate of 

 lead. The portion thus precipitated was extractive. The por- 

 tion not soluble in alcohol was gelatin. 



The portion of liver left after the action of cold and boiling 

 water was treated with boiling alcohol. A transparent light- 

 yellow tincture was obtained, which became muddy on cooling, 

 and gradually let fall a yellowish-white precipitate, which was se- 

 parated from the liquid and digested in ether. The ether dis- 

 solved a portion of fatty matter, which crystallized in stars, and 

 which was considered as stearin. The solution contained also a 

 portion of elain. 



The ether left a residue which possessed the following proper- 

 ties : It was a solid, granular, brownish-yellow mass. When 

 dry it became hard and brittle, and had neither taste nor smell. 

 It did not melt when heated to 212. At a higher tempera- 

 ture it swelled up and burnt with flame, giving out a great deal 

 of smoke. When distilled per se it gave out a very small quan- 

 tity of carbonate of ammonia, probably owing to the presence 

 of a little foreign matter. It was quite insoluble in water, inso- 

 luble in cold, but pretty soluble in boiling alcohol. It was inso- 

 luble in ether. When heated with caustic potash, it formed a 

 clear solution, from which acids threw down white flocks. When 

 these flocks were carefully washed with water, they were soluble 

 in alcohol and ether, and the solution had no acid reaction. 



