198 F. Leininger: Relation of Electric Charges transported 
Hie. 7 
Absorption curves of cathode rays in oxygen. 

i 2 3B #2, 8S Melee Cw ore ie ee 
Summary of Results. 
The determination of the ratio of the cathode and canal 
rays to the exciting current has in the first place shown that 
the electric quantities transported by the rays form a direct 
fraction of the exciting current. This fraction greatly in- 
creases with increasing exhaustion, and from its high value 
at very low pressures, when all the necessary corrections 
have been applied, we must conclude that at such pressures 
the current is used up almost entirely in the production of 
cathode and canal rays. Correcting the observed ray con- 
vection currents for absorption by the wire gauze leads to the 
improbable result that the sum of the rates of transfer of 

