1877.] Electrolytic Conduction of some Organic Bodies. 3 



1 millim. apart. The liquids were placed in this tube, and the wires 

 connected with the terminal wires of the battery, an ordinary astatic 

 galvanometer being placed in the circuit. The results obtained are as 

 follows : — 



Ethyl Iodide.— Nil. 



Alcohol. — On making contact the galvanometer-needle showed a de- 

 flection of 20°, and a slight commotion of the liquid was observable. 

 The alcohol gradually warmed up until it boiled, the deflection of the 

 needle increasing the whole time. Gras was apparently given off in 

 minute quantity from the negative electrode ; but it was difficult to be 

 certain of this. 



Equal volumes of Alcohol and Ethyl Iodide. — There was a deflection 

 of 30° on making contact, gradually rising. G-reat commotion ensued, 

 the liquid rapidly circulating round the poles, as in the annexed diagram, 

 accompanied by a browning of the liquid. Not certain about the evolu- 

 tion of gas — apparently a few minute bubbles from the positive pole. 

 The liquid boiled in about 4 minutes, the deflection being then 60°. 



Ethyl Bromide. — Nil. 



Equal volumes of Alcohol and Ethyl Bromide. — Violent commotion on 

 making contact, the galvanometer being deflected to the stops. The 

 liquid quickly boiled. Gras apparently given off from the negative 

 electrode. 



Chloroform. — Nil. 



Equal volumes of Alcohol and Chloroform. — Violent commotion. De- 

 flection to stops. The mixture very quickly boiled. 



Ethyl Acetate, Propylene Bromide, Amyl and Isobutyl Iodides gave nega- 

 tive results. "When mixed with equal volumes of alcohol they behave 

 similarly to the mixtures referred to above. 



Our results, preliminary as we considered them to be, show that the 

 iodides of ethyl, isobutyl, and amyl, the bromides of ethyl and propylene, 

 the acetate of ethyl, and chloroform are practically non-conductors to a 

 battery -power of 100 cells Grrove, and that alcohol is to some extent 



b2 



