114 



to a body derived from 3 atoms of this aldehyde, in which 2 (O 2 ) is 

 replaced by 2(I 2 ). 



3 atoms of oil of bitter almonds, Oxyiodide of Benzaldehyde, 

 C 42 H 18 6 C 42 H 18 2 I 4 . 



In the case of acrolein, the action of hydrochloric acid is different ; 

 it combines directly with it, no elimination of water taking place. If 

 we conceive, however, that, in the action of this acid on common 

 aldehyde, the water which is there produced is the effect of a 

 further decomposition, then we may readily suppose that, if this 

 further decomposition had taken place in the case of hydrochloric 

 acid and acrolein, a body derived from two atoms of acrolein, 

 and having O 2 replaced by C1 2 , corresponding to the second term in 

 the combination of aldehyde and chlorine, would have been the re- 

 sult; thus 



2 atoms of hydrochlorate of acrolein 

 C 12 H 10 O 4 C1 2 -2(HO)=C 12 H 8 O 2 C1 2 , corresponding to the 

 term C s H 8 O 2 C1 2 in common aldehyde. 



There is a curious connexion which may be mentioned, in this 

 substitution of chlorine for oxygen in aldehyde, between the formula 

 of these bodies containing chlorine, and those of the isomeric modi- 

 fications of aldehyde. 



V. " On the Action of Acids on Glycol " (Second Notice.) By 

 Dr. MAXWELL SIMPSON. Communicated by Dr. FRANK- 

 LAND. Received June 29, 1859. 



Since my last communication to the Society, I have discovered a 

 more convenient process for the preparation of chloracetine of glycol. 

 I have ascertained that the monoacetate of glycol is as readily con- 

 verted into this substance by the action of hydrochloric acid, as a 

 mixture of acetic acid and glycol. As the monoacetate is easily ob- 

 tained, and for this purpose need not be quite pure, it is possible by 

 this method to prepare the body in question on a large scale and 

 with great facility. It is simply necessary to conduct a stream of 

 dry hydrochloric acid gas into the monoacetate, maintained at the 

 temperature of 100C., till the quantity of oil precipitated on the 



