OF ARTS AND SCIENCES. 107 



it forms an oil which does not solidify at 0°. From carbonic disulphide 

 or chloroform it crystallizes by slow evaporation in oblique prisms of 

 the triclinic system which melt at 102-103°. lu the analysis of this 

 substance the following results were obtained : — 



I. 0.1582 grm. of the substance gave by the method of Carius, 



0.3234 grm. AgCl + AgBr. 

 II. 0.1582 grm. of the substance gave 0.3251 grm. AgCl -|- AgBr. 



III. 0.9373 grm. of the substance gave 1.9049 grm. AgCl -j- AgBr. 



1.9003 grm. AgCl + AgBr gave 1.1568 grm. Ag.* 



IV. 0.8096 grm. of the substance gave 0.3065 grm. CO^ and 0.0631 



grm. up. 



The barium, calcium, and potassium salts of this acid were made 

 and analyzed. 



Baric chlortrihrompropionate Ba(CgHClBr302)2. 



To form the barium salt a solution of the acid was neutralized with 

 baric carbonate and baric hydrate, filtered, and concentrated by spon- 

 taneous evaporation at the ordinary temperature. The salt crystallized 

 in slender oblique prisms which were quite soluble in cold water. 

 The air-dried salt was constant when heated to 80°. 



I. 0.6933 grm. of the salt dried at 80° gave on ignition with HgSO^ 



0.1920 grm. BaSO^. 

 II. 0.6440 grm. of the salt dried at 80° gave 0.1793 grm. BaSO^ . 



Calculated for Ba( C3HClBr30.2).2 . Found. 



I. n. 



Ba 16.59 16.26 16.37 



* This determination was made with the aid of the excellent method devised 

 by Mr. L. P. Kinnicutt. (These Proceedings, Vol. XVI. p. 91.) 



