OF ARTS AND SCIENCES. 



303 



H 



C4 H2 H O3 = § Glycerile oxide. 



HfO, 



CI 

 C4 H2 CI CI3 H- 2 = Cliloroform. 

 CI 



Br 

 C4 H2 Br Br3 H- 2 = Bromoform.* 

 Br 



I 



C4 Hj I I3 -^ 2 = Iodoform. 

 1 



I 



C4 Hj I CI3 -^ 2 = Chloro-iodoform. 

 CI 



Br 



C4 H2 Br I3 -T- 2 = Bromo-iodoform. 

 I 



C4 H2 H p, -^ 2 = Hydrofluate of Methylene.! 



* For the observation that this and the following four bodies may be included 

 in the series, the author is indebted to his friend Dr. Peirce, of the Cambridge 

 Laboratory. 



t The hydrofluate of methylene has a pleasant ethereal smell. 



