I'HKMISTRY OF THK LK r fu M A I \ K8. 327 



from mil- 'Ic-tis- IK- it-.-lf. It has also been obtained from 

 yeast liquors by Scui T/KM-.KRGER, and from urine by 

 POUCIIET. It <"iii In- separated from the meat-extract, of 

 which it forms aUdit one per cent., by the following method 

 originally employed ly WEIDEL. The extract is dissolved 

 in six or seven parts of warm water, then concent rated 

 baryta water is added, avoiding, however, an excess. The 

 filtrate ie precipitated by basic lead acetate. The precipitate 

 is collected, thoroughly washed and pressed, and finally it 

 is repeatedly extracted with a large quantity of boiling 

 water. The caruine lead salt is thus dissolved out; the 

 filtrate, alter removal of the lead by hydrogen sulphide, is 

 evaporated to a small volume. The concentrated solution 

 thus obtained is treated with silver nitrate, which givi - a 

 precipitate of silver chloride and of the silver salt of car- 

 uine. \\\ treatment with ammonium hydrate the silver 

 chloride etui lx> completely removed from the precipitate, 

 whereas the silver compound of carniue is insoluble in that 

 nt. To obtain pure carnine the silver salt is decom- 

 posed with hydrogen sulphide, and the filtrate, after purifi- 

 cation by bone-black, is evaporated to crystallization. 



Carnine forms white crystalline masses, which on drying 

 become loose and chalk-like. It is very difficultly soluble 

 in cold water, easily and completely in boiling water, and 

 ivcrystallizes on cooling. It is insoluble in alcohol and 

 ether. The taste is decidedly, bitter, and the reaction is 

 neutral. The base is not precipitated by neutral lead 

 acetate, but is precipitated by the basic salt as a Hoccnlcnt 

 white precipitate, soluble in boiling water. On heating, 

 carniue decomposes and fakes fire, and at the same time 

 gives otl'a peculiar odor. It crvstalli/.es with one molecule 

 of water, which it loses at 10()-110. 



The hydrochloride, (UTgN/ ) 3 .I1( 'I. is crystalline, and 

 decomposes on heating with concentrated hydrochloric acid. 



The platinoehloride, ( U W > 3 .HCl.Ptrl 4 , f<nns a fine, 

 sandy. golden-yellow powder. 



With silver nitrate, caruine unites to forma white floccu- 

 lent pm-ipitate, insoluble in nitric acid or in ammonium liy- 

 Ir.u . It- formula corresponds to 2(C 7 II 7 Ag\ 4 Oj)-f-AgN0 3 . 



