PRODUCED IN GASES BY RONTGEN RAYS. 
219 
The following is a set of readings taken for the positive ions in oxygen saturated 
with aqueous vapour :— 
Temperature = 15'6° C. X = 5'01 centims. Barometer = 7 6'5 centims. 
Excess pressure in gasometer = ‘44 centims. 
„ „ apparatus = TG ,, 
6 cells = 12*35 volts. 
Table X.—Moist Oxygen. Positive Ions. 
Voltage of outer 
cylinder. 
Electrometer deflection 
in 30 seconds. 
Descent of gasometer 
in 40 seconds. 
Cells. 
Divisions. 
Centims. 
+ 2 
145 
2-30 
+ 3 
55'5 
2-31 
+ 3-6 
20-5 
2-29 
+ 3-2 
41 
2-29 
+ 2-8 
73-5 
2-27 
+ 2-4 
112 
2-25 
+ 2-2 
127 
2-25 
The results are represented by Curve II. of fig. 10. 
2 F 2 
