﻿of Ions made by a, /3, y, and X Rayi 

 Table VI. 



287 



X Rays. 



a Rays. 





Tolts Ratio. 



per cm. 



Lack of 



saturation 



and time 



of leak. 



Volts 

 per cm. 



Lack of 



-p. a . saturation 

 Deflexion. j 



and time 



of leak. 



Air. 



... 





: 700 



80 



8 



700 



80 



8 



2642 

 2539 

 2023 



15 sec. 

 4 p. cent. 

 23 „ 



Air bubbled through 



methyl-alcohol for 



2 in in. 



20 \ 159 

 710 158 



8 | 154 



20 sec. 



2640 15 sec. 

 2437 8 p. cent. 

 1855 30 „ 



A stream of C0. 2 



passed through 



chamber for 2 min. 



1200 



8 



1200 



8 



134 

 124 

 136 

 129 



10 sec. 

 8 p. cent, 



4 „ 



660 

 79 

 20 

 79 



3008 

 2459 

 1963 

 1544 



13 sec. 

 18 p. cent. 

 35 „ 

 49 „ 



Ethyl chloride 



passed into 



chamber. 



1200 

 20 



1200 

 20 



1200 



346 

 296 

 313 



298 

 332 



20 sec. 

 10 p. cent. 



1050 



660 



390 



79 



20 



7-9 



2869 

 2691 

 2306 

 1470 

 997 

 817 



10 sec. 

 6 p. cent. 

 20 ., 

 40 „ 

 65 „ 

 72 „ 



Air. 



800 



162 



20 sec. 









The ratios only of the deflexions of the two chambers are 

 given in the tables. 



Calculation showed that general recombination could not 

 have appreciably affected the above readings. 



The X-ray bulb used in these experiments gave fairly 

 constant rays. When the X-ray bulb was sending out rays 

 and the two chambers disconnected from the electrometer, an 

 approximately constant leak (largely due to stray X rays) 

 was obtained. This leak was subtracted from the adjustable 

 chamber reading. 



The natural leak of each of the two chambers was so small 

 as to be negligible. 



^ The X-ray readings for the different gases and mixtures of 

 air and a gas are not strictly comparable with one another, 

 except in the cases stated or indicated in the tables, because 

 any slight displacement of the X-ray bulb or chambers 

 between a set of experiments would alter the ratio. 



The uranium readings in Table V. are also not comparable 

 with one another because the layer of uranium oxide had to 

 be replaced by another once or twice on account of some 

 liquid getting accidentally into the chamber, but the uranium 



