148 



PROCEEDINGS OP THE AMERICAN ACADEMY 



Crystalline Form op ^ Dichlordibrompropionic Acid. 



(01 



iQV 



MonocUnic System. 

 Forms, {100} {110} ^111} {102} 



Elements : Clinodiagonal a = 2.393 

 Orthodiagonal b = 1 

 Vertical axis c = 1.731 

 Angle of axes XZ =: 46° 9 



Angles between Normals. 



/Ol 



The difference between the « and ^ acids was further confirmed by 

 a study of the silver and barium salts. 



Argentic ^ Dichlordihrompropionate, AgCjIICloBi-.^O^ . The silver 

 salt is precipitated in the form of short, thick, pointed prisms when 

 argentic nitrate is added to an aqueous solution of the acid. It is 



