Products of the Oxidation of Wool. 363 



(C 4 H,NAg0 2 ) 2 AgHO,H 2 0. 





Calculated. 



A 



Found. 



A 



Co 



.... 96 



17-30 



2-00 



58-38 



17-90 — 



Ei 



.... 11 



2-19 — 



No 



.... 28 





Ag 3 



0« 



.... 324 

 .... 96 



56-< 



555 



This basic salt requires further investigation. 



Cyano-propionate of Lead is insoluble, or sparingly soluble 

 in water. It is obtained as a white precipitate on mixing an 

 aqueous solution of the baryta-salt with an aqueous solution 

 of acetate of lead. The precipitate was washed, pressed be- 

 tween bibulous paper, dried at 100° C, and analyzed. 



0*463 grin., burnt with oxide of copper, gave 0*112 grm. of 

 water and 0*374 grm. of carbonic acid. 



(C,H 4 NPb0 2 ) 2 ,H 2 0. 



Calculated. 



a A v Found. 



C 8 96 22-80 22-03 



H 10 10 2-38 2-69 



N 2 28 — 



Pb 2 207 — 



5 _80 - 



421 



Cyano-propionate of Magnesia. — This salt was prepared by 

 precipitating the baryta-salt by an equivalent of sulphate of 

 magnesia, separating the sulphate of baryta by nitration, and 

 evaporating the aqueous solution of the magnesia-salt in the 

 water-bath. It is very soluble in water, and on drying at 

 100° C. forms a jelly, which by very long-continued drying 

 at 100° C. yields a brittle mass which may be powdered (giving 

 a white powder). The powder was analyzed : 0*863 grm. 

 yielded, on ignition, 0*132 grm. of magnesia, or 9*18 per cent, 

 of magnesium. The formula (C 4 H 4 N Mg0 2 ) 2 3 H 2 O requires 

 Mg per cent. = 8-90. ^ 



The magnesia-salt is very sparingly soluble in weak alcohol, 

 an aqueous solution yielding a precipitate when it is mixed 

 with alcohol. 



Cyano-propionate of Potash, C 4 H 4 N K0 2 H 2 O (dry at 

 190° C). — We have prepared this salt by taking a weighed 

 quantity of the acid (dry at 100° C), dissolving it in a small 

 quantity of water, and then exactly neutralizing the solution 



