ELECTRIFICATION OF ATR, VAPOUR OF WATER, AND OTHER GASES. 205 



45. Some experiments were made to ascertain how long the air, on being 

 shaken up with Loch Katrine water, retains its negative electrification. 



46. A strong solution of ammonia (500 cub. centirns.) was placed in the bottle. 

 Without shaking the bottle, the mixed air and ammonia evaporating from the surface 

 of the liquid were aspirated. They were found i,o be negatively electrified to a 

 fraction of a volt. 



