On some new Eledro-chemical Vhcenomena. 127 



A. The flame of arsenicated hydrogen was attracted hv the 

 negative surface : the fumes of white arsenic produced during 

 the combustion were slightly attracted towards the positive pole. 



5. The flame of hydrogen appearefl weai^lv attracted by the 

 negatively electrific?J ball ; but on employing tlie apparatus with 

 thermometers, the rise was nearly equal on both sidt-s. In one 

 experiment, jnade with much caution, the thermometers stood 

 at its commencemer.t at 56". The gas was burned for two 

 minutes : the negative thermometer rose to 62°, tiie positive to 

 6I». 



In a second experiment, the combustion was continued for five 

 minutes : the effect upon the negative thermometer was = 4°, 

 that upon the positive =2-.)®. 



6. With a very small stream of carbonic oxide, the results 

 were still less distinct. The tip of the flame appeared in some 

 cases to be slightly inclined towards the positive ball, but one 

 thermometer was not more affected than the other. 



On substituting a larger current of the gas, which produced a 

 flame betvveen three and four inches in length, it was much more 

 evidently directed to the positive surface, but the rise in the po- 

 sitive thermometer was less than might have been expected. In 

 several cases where the combustion was continued for two mi- 

 nutes, the rise in the positive thermometer did not exceed that 

 of the negative more than 2-5 to 3 degrees. 



7. Sulphur, in a state of combustion, was placed between the 

 oppositely electrified balls. The flame being extremely small, 

 its direction could not be obsen^ed, but the sulphureous acid va- 

 pour was attracted by the positive ball. 



8. The^ame of the sulphuret of carbon (sulphuretted liquor 

 of Lampadius) was attracted by the negative surface : the acid 



fumes which it throws off took an opposite direction. 



9. \Vhen phosphorus in a state of vivid combustion was in- 

 troduced into the electrical circuit, the flame, and the phosphoric 

 acid produced, were powerfully directed towards the positive sur- 

 face. 



The acid vapour which arises from phosphorus, during its slow 

 combustion in a warm atmosphere, is also attracted by the po- 

 •itively electrified ball. 



10. A small stream of muriatic acid gas was allowed to pass 

 into the atmosphere betv.een tlie electrified spheres ; it was im- 

 mediately attracted to t!ie positive pole. This effect is rendered 

 more evident by the diffusion of a small quantity of ammonia 

 through the atmosphere of the room in vvliich the exj>erimeiit is 

 made. 



The attraction of the muriatic acid is strikingly exhibited by 

 coating the conductors with litmus paper, placing them at a 



distance 



