Chemical Nature of Wax. 223 



III. 0-2612 grm. gave 0*7562 carbonic acid and 0-308 water. 

 These analyses correspond in parts per cent, to — 



100*00 100*00 100*00 



The silver salt of this acid was made by precipitating the 

 ammoniacal solution of the acid in alcohol with nitrate of silver. 

 It is desirable to take an excess of ammonia, and the solution 

 must be precipitated boiling by a hot alcoholic solution of the 

 nitrate. The salt is to be washed with water and dried, first 

 in vacuo, then in a water-bath. 



I. 0*469 grm. of this salt gave 1*067 carbonic acid and 

 0*4315 water. 



II. 0*4663 grm. of this salt gave 1*0675 carbonic acid and 

 0*4273 water, giving in 100 parts, — 



I. II. 



Carbon 62*04 62*43 



Hydrogen .... 10*22 10*18 



Oxygen and silver . 27*74 27*39 



100*00 100-00 



I. 0'6566 grm. of this salt gave 0*1413 grm. of silver. 



II. 0*6508 grm. of this salt gave 0*1388 grm. of silver. 



III. 0-6147 grm. of this salt gave 0*1292 grm. of silver. 



IV. 0*6641 grm. of another preparation gave 0*1396 grm. 

 of silver. 



V. 0-665 grm. of the same preparation gave 0*1396 grm. 

 of silver. 



These determinations correspond in 100 parts to — 



I. II. III. IV. V. 



Silver 21*52 21*33 21*02 21*02 20*99 



The above analyses agree with the formula C S4 Hgg 3 , AgO. 



Atomic weight. Calculated in 100 parts. 

 C^ . . . . 324*0 62*66 



H^ . . . . 53*0 10*25 



4 . . . * 32-0 6*19 



Ag .... 108*1 20*90 



517*1 100*00 



Cerotic JEther. 



The combination of this acid with the oxide of ethyle is 

 readily obtained by dissolving the acid in absolute alcohol, 



