462 



PROCEEDINGS OP THE AMERICAN ACADEMY. 



VIII. The distillate from a mixture of 0.1469 gram of the substance 

 with phosphoric acid required 5.67 cubic centimeters of a 

 decinormal alkali for neutralization. Approximately cor- 

 rected for the alkalimetric equivalent of the argentic phos- 

 phate and bromide obtained from the distillate, this amount 

 becomes 5.47 c.c. 



Calculated for 



It is evident that most of the substance analyzed had lost some of 

 its ammonia and water. A few other determinations were made of 

 substance just prepared and not dried at all, in order to be sure that 

 the atomic ratio of the ammonia to the copper was not greater than 

 3:1. This point was proved beyond a doubt. 



(3.) CuPRiAMMONiuM Propionobromide, Cu(NH3)oBrC3H50.2. 



Ten grams of ammonic propionate, made by neutralizing propionic 

 acid with ammonia gas and allowing the solution to evaporate over 

 caustic potash, were mixed with two grams of cupric bromide, and 



