﻿360 Dr. G. Owen and Mr. J. H. T. Roberts on the 



Tabls II. 



Volts on Tube -22. 



Eadium in position R 2 , see fig. (weak ionization). 





Current 



Current 







y 



Expansion =~ • 

 * i 



before 



after 



Observation. 



~ 2 X100. 

 u 1 



expansion. 



expansion. 







C t . 



C, 







1-233 







Few drops. 





1-245 



418 



400 



Fair shower. 



95-7 



1-250 



412 



380 



Dense shower. 



92-2 



1-262 



410 



349 



Cloud. 



85-1 



1-280 



402 



302 



55 



751 



1-295 



396 



292 



„ 



73-7 



T308 



392 



288 





735 



1-322 



391 



279 





71-4 



1-334 



387 



277 



!5 



71-6 



1-349 



386 



272 



55 



70-5 



1-374 



379 



265 





69-9 



1-395 



375 



251 





669 



1-438 



362 



208 





57-5 



Table III. 



Volts on Tube -4. 



Radium in position R., (weak ionization). 



1 



Current 



Current 







v 



Expansion ^ • i 



before 



after 



Observation. 



&xioo. 



V, 



expansion. 

 Ox- 



expansion. 



C, 





Oi 



1-222 







No effect. 





1230 



420-5 



416-5 



Thin shower. 



99 i 



1-236 



4160 



392 



Fair shower. 



93-7 



1-243 



415 



272-0 



Very dense shower. 



65-6 



1-253 



410 



207 



Thin cloud. 



50-5 



1-264 



410 



130 



Heavy cloud. 



31-7 



1-273 



409 



114 



■ 



27-9 



1-281 



406 



111 





27-3 



1-288 



405 



108 





26-7 



1-299 



404 



105 





26-2 



1-307 



403 



104 





260 



1-320 



401 



99 





24-7 



1-355 



393 



93 



Jr 



23-7 



1-372 



390 



90 





23-1 



1-401 



383 



84 





21-9 



1-436 



375 



75 





200 



The results of Tables II. and III. are shown respectively 

 in Curves I., II., fig. 3 (Curve III. will receive mention 

 later). Curves I. and II. were obtained under identical 

 conditions, except as regards potential — the voltage on the 



