466 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



IV. 0.1025 gram of the substance yielded 0.0659 gram of argentic 



chloride. 

 V. 0.1015 gram of the substance yielded 0.0656 gram of argentic 



chloride. 



Attempts were made to make similar compounds of butyric acid 

 without success. Various different proportions, suggested by those 

 required ia the previous preparations, were tried with equal failure, 

 and the attempts were finally discontinued. 



It was also hoped that such compounds as Cu(NH3)2ClN03 and 

 Cu(NH8)2N03 . C2H3O2 might be found. The results of a great 

 many experiments showed that under ordinary conditions nothing 

 but Cu(NHg)2Cl2, or Cu(NH8)4(N03)2, can be obtained. Further 

 attempts to combine cupriammonium sulphate with cupriammonium 

 acetate were also unsuccessful ; so that in these directions the field 

 seems to be limited. All of these facts, as well as the relative proper- 

 ties of those compounds which have been prej^ared, may be of some 

 use in the future when the structure of the cupriammonium com- 

 pounds comes under consideration. "Work upon the subject, as well 

 as upon similar investigation of products containing amines instead of 

 ammonia, is being continued here. 



Cambridge, Mass., September 20, 1894. 



