and some of its Products of Decomposition. 



67 



1 



Carbon, - 



Hydrogen, 



Nitrogen, 



Oxygen, 



Oxyd of copper, 



Theory 



4 equiv. 



5 ; < 



4 " 



24 



5 

 14 

 32 

 39 7 



1147 



20-92 



4-35 



27-92 



34-61 



Experiment. 



20-66 

 4-90 



12 65 



27-81 

 33-89 



ioo-oo 



100-1)0 



With the loss of an atom of water, we have the salt 



C 4 H 



4 NO„CuO, 



In a few hours it separated 



which it will be seen is precisely the composition derived from 

 Boussingault's analysis of the salt dried at 120° C, = [248° F.] 

 See page 373. 



Glycocoll and Protoxyd of Lead. 



Gl, PbO, HO. 



This salt was prepared by dissolving with the aid of heat, prot- 

 oxyd of lead (obtained from the peroxyd by long continued heat) 

 in a concentrated aqueous solution of glycocoll, and the addition 

 of alcohol till it began to be turbid. 



in prismatic crystals that slowly increased in size for several days, 

 particularly with successive additions of absolute alcohol. The 

 crystals remind one of cyanid of mercury. 



A single combustion with chromate of lead gave from 1-3967 

 grm. substance, 0-6182 grm. carbonic acid, equal to 1207 per 

 cent, of carbon, corresponding with the formula derived from 

 Boussingault's analysis with the addition of an atom of water, 



C 4 H 4 N0 n ,Pb0,H0, 



which requires 12-83 per cent, of carbon. 



Boussingault's analysis was made from the salt, dried at 

 120o a, [2483 P,,l leaving C 4 H 4 NO,, PbO. 



Glycocoll and Oxyd of Silver. 



Gl, AgO, HO. 



Gl, AgU, HU. 



If oxyd of silver be added to a solution of glycocoll, it readily 

 dissolves with th« annliratinn of heat. With the addition of alco- 



wartform 



dissolves with the application of heat, 

 hoi the above compound crystallizes i 

 become dark upon exposure to light. . . 



This salt was not analyzed, as Boussingault's analysis of it, 

 dried at 110° C. [230° F.J as already noticed, gave the formula 



C 4 H 4 N0 3 ,Ag0. 



There is scarcely a doubt that corresponding compounds of co- 

 balt, nickel, manganese and iron protoxyds with glycocoll, might 



with nearly equal facility be prepared. 

 These. pnmnAnn^c, «w> r.Q^v.ar.Q anniAffniK! in those of ammonia 



copper and 



perhaps 



