Tem- 

 perature. 



IONS PRODUCED BY RONTGEN RAYS IN GASES AND VAPOURS. 

 Electric Hei S ht of fal1 to 



267 



field. 



1 C. Yolts/cm. 



1st point. 2nd point. 



Time. 



Pressure. 



k. 



cm./sec. cm./sec. 



em. /sec. 



ETHYL ETHER. 



10 



19 



18-5 



9 



19 



38-7 



13-5 



7-7 

 38-7 



9-7 



5-8 







19-3 



,, r , f positive ion 0'29 cm./sec. 



Mean values of 7 ,, | | iegatiye ^ Q . 31 ;/ 



ETHYL ACETATE. 



54-8 



,. - , f positive ion 0'31 cm./sec. 



Mean values ot k-,- M < f 



\ negative 0-28 ,, 



0-27 



0-29 

 0-28 



METHYL BROMIDE. 



22 



77-4 



38-7 

 19-3 

 13-5 



55-0 



,, t ; f positive ion 29 cm./sec. 



Mean values of *roo { egative f> -28 



2 M 2 



0-25 



0-28 

 0-31 



0-30 

 0-28 



