OF ARTS AND SCIENCES. 239 



The solubility of this acid in cold water was determined by the 

 same method as the diiodbromacrylic acid. 



I. 11.6861 grm. solution gave 0.4178 grm. BaSO^. 

 II. 14.4534 grm. solution gave 0.5264 grm. BaSO^. 



The solution, saturated at 20°, contains the percentages : — 



I. n. 



5.69 5.80 



The mean of these results gives 17.41 parts as the quantity of water 

 required for solution at 20°. 



Salts of Chlorbromacrtlic Acid. 



The salts of this acid were made by the same methods as the corre- 

 sponding salts of diiodbromacrylic acid. 



Baric Chlorbromacrylate, Ba(C3ClBr02H)2.2H20. This salt crys- 

 tallizes in flattened prisms, which belong apparently to the monoclinic 

 system. Its composition was established by the following analyses : — 



The solubility in cold water was determined by the method of V. 

 Meyer. 



I. 2.8936 grm. solution gave 0.1914 grm. BaSO,. 

 11. 5.1385 grm. solution gave 0.3378 grm. BaSO^. 



From these results the following percentages were calculated : — 



I. 11. 



14.06 14.28 



This salt, therefore, requires for solution 6.985 parts of water at 20°. 



Calcic Chlorhromacrylate, Ca(C3ClHrO,II),.4H,,0. This salt forms 

 branching needles, which are very soluble in hot, less soluble in cold, 

 water. 



