OF ARTS AND SCIENCES. 



141 



I. 0.5480 grm. substauce gave 0.1837 grm. COg and 0.0286 grin. 

 11,0. 

 II. 0.1775 grm. substance gave 0.3432 grm. AgBr. 



Calculated for C3HoBr40., 



C 9.23 



H 0.51 



Br 82.04 



Found. 

 I. II. 



9.14 



0.58 



82.28 



Tetrabrompropionic acid crystallizes in prisms of the triclinia sys- 

 tem which melt at 125-126°. It is very soluble in alcohol or ether, 

 readily soluble in hot chloroform, carbonic disulphide or benzol, and 

 separates in crystals as these solutions cool. lu ligroin it is sparingly 

 soluble. Under water it melts at a very low temperature to a color- 

 less oil which dissolves freely on heating. 



For a crystallographic study of the substance we are indebted to 

 Dr. W. H. Melville, 



Crystalline Form of Tetrabrompropionic Acid. 



010 



CQI 



Triclinic System. 



Forms, ^100} ^010} {001} {011} 



Elements: Macrodiagonal a =1.507 

 Brachydiagonal b = 1 

 Vertical Axis c = 0.934 



Angles of Axes XY =94° 59' 

 XZ= 104° 28' 

 YZ = 74°20' 



:1T0V 



