196 F. Leininger: Relation of Electric Charges transported 
graphically represented. The curves show that the absorption is 
strongest in oxygen; but even in this case it is greatly reduced 
at, low pressures. It is further evident from the curves that 
the canal rays are in general absorbed more strongly than the 
cathode rays. 
Considering the tabulated results from a perfectly general 
point of view, one of the most striking features is the im- 
probably large percentage value of the rays when the cor- 
rections are taken into account, as, é. g., in Tables III.-VIIL., 
at very low pressures. If my original supposition be adopted, 
according to which the cathode and canal rays form a portion 
Fig. 4. 
Absorption curves of canal rays in oxygen. 
150 
140 
130 
120 VI 
110 te 
100 
30 
89 Vv 
70 
60 
20 Tir 
40+ IT: Be 
30 
20 I ae ine 
10 ee ee 
| Zz SH 4 5; 6 re 8 9 10 
Curve I. Potentials of 600-— 700 volts. 
os ue 5 900-1100 __,, 
sy LTE, i 1150-1300 _,, 
veil Wee s 2000-2400 ,, 
a WE i 4000-4500 |, 
oo VG 4 5800-7000 _,, 
of the current, then the value of 50 per cent. could not be 
exceeded. The results could only be explained by supposing 
that the correction-coefficients are not as large as I have 
assumed them. It is possible that the reflexion-coefficient 
of the cathode rays alters with their velocity, and that under 
the circumstances of my experiments other values should 
have been adopted. For this reason, the values corrected for 
absorption and those corrected for absorption and reflexion of 
the rays are given separately. Besides, very little can be said 
as to what becomes of the reflected rays. In any case I feel 
