OF ARTS AND SCIENCES. 



375 



III. 



49.32 



While we have been unable to establish with precision the constitu- 

 tion of the foregoing derivatives of furfuracrylic acid, the analogies 

 offered by the derivatives of pyromucic and cinnamic acids naturally 

 suggest the following formulas for the substances in question : — 



HC = C - CHBr - CHBr - COOH 

 \ 



O 

 / 



IIC = C 

 \ 

 Br 



Bromfurfurdibrompropicmic Acid. 



HC = C - CH = CHBr 

 \ 



O 

 / 



HC = C 

 \ 

 Br 



Bromfurfurethylen. 



HC = C - CH = CBr - COOH 



\ 

 O 



/ 

 HC = C 



\ 

 Br 



HC = C - CH = CH - COOH 



\ 

 O 



/ 

 HC = C 



\ 

 Br 



Bromfurfurbromacrylic Acid. 



Bromfurfuracrylic Acid. 



