[BOYLE] TEMPERATURE AND VELOCITY OF GAS CURRENT 93 
TABLE 1. 
EMANATION DIRECTLY INTO TESTING VESSEL. _ 


Ionization Currents 
H r > à 5 5 
Flow in ce/ sec. in arbitrary units. 

.30 91 
37 174 
76 380 
1.12 441 
1.86 464 
2.52 433 
3.80 291 
5.18 238 
6.60 224 
8.40 192 
10.7 169 
12.6 149 

300 
290 

IONIZATION CURRENT. 
~ 
O 
9 
© 2 4 6 8 10 /2 1s 
FLOW IN CC. PER SEC. 
Fie. +. 
Fig. 4, table 1, shows the experimental curve to test this point. It con- . 
—2V —7.W 
forms to the conditions Just deduced. From (1),i= K Net |[1—e@ 
it can be seen that the ionization current depends not only on g, the speed 
of the air current, and on W, the volume of the testing vessel, but also 
on V, the free volume of the space through which the emanation is con- 
