ELECTRICAL CONDUCTIVITY OF AIR AND SALT VAPOURS. 
441 
electrode, so that no separation of the two constituent atoms of the molecule takes 
place. 
The high velocity of the negative ions, compared with that of the positive ions, 
seems to favour the latter view, but the known cases in wdrich separation of the 
elements of a compound by electrolysis in gases appears to take place, strongly 
su23i3ort the view that the ions are similar to those existing in solutions. 
The present experiments do not show what happens to the ions after they have 
discharged on the electrodes, except that apparently they do not participate any 
further in the transport of the electricity. It is hoped that future experiments will 
throw more light on this question. 
3 L 
VOL, CXCVII. A. 
