OP ARTS AND SCIENCES. 213 



IV. 



70.79 70.37 



Methylpyromucic tetrabromide is very sparingly soluble in car- 

 bonic disulpbide or ligroin, somewbat less sparingly soluble in 

 cbloroform or benzol. In hot chloroform or benzol it dissolves 

 more freely, but decomposition evidently ensues, for little unaltered 

 substance crystallizes on cooling. The substance melts at about 

 95° with decomposition, but the melting point varies with the 

 rapidity with which it is heated. Although the addition product 

 is so unstable we have been able to find but few definite products 

 resulting from its decomposition. Alcoholic sodic Irydrate appar- 

 ently destroys it completely. Sodic acetate in glacial acetic acid 

 gives the brommethylpyromucic acid melting at 150-151°, and the 

 same acid also appears to be formed in the spontaneous decomposi- 

 tion of the body when exposed to the air. 



Further investigations in this direction will be made in this 

 Laboratory. 



