1-16 



PROCEEDINGS OP THE AMERICAN ACADEMY 



Angles beticeen Normals. 



Observed. 



Calculated. 



> Fundamental ancrles. 



38° 41' 

 35° 52' 

 55° 30' 

 100° 39' 

 98° 38' 

 88° 20' 

 50° 30' 



Argentic a Dichlordibrompropionate, AgCgHCl^Br.^O, . The silver 

 salt falls, on the addition of argentic nitrate to an aqueous solution of 

 the acid, in flattened jagged needles which are readily decomposed by 

 heat. They could, however, be dried over sulphuric acid without any 

 essential decomposition, as is shown by the following analysis : — 



0.4885 grm. of substance gave by precipitation with HBr 0.2231 

 grm. AgBr. 



Calculated for AgCsHCUBrA • 

 26.46 



Found. 

 26.23 



Baric a Dichlordibrompropionate, Ba(C3HCl2Br202)2 • The barium 

 salt we made by neutralizing a cold aqueous solution of the acid with 

 baric carbonate. On evaporation at ordinary temperatures it crys- 

 tallized in long branching needles, which when dried by exposure to 

 the air did not lose materially in weight over sulphuric acid, and con- 

 tained a percentage of barium corresponding to the anhydrous salt. 



I. 0.5069 grm. of the air-dried salt gave 0.1 G06 grm. BaSO^ . 

 II. 0.5239 grm. of the air-dried salt gave 0.1G7G grm. BaSO^. 



Calculated for Ba(C3HCl2Br.,0.)o 

 Ba 18.59 



Found. 

 I. II. 



18.58 18.81 



