IONS PRODUCED BY RONTGEN RAYS IN GASES AND VAPOURS. 263 



Tern- Electric Height of fall to * 760 . 



perature. field. Tlme " Insure. k. 



1st point. 2nd point. .(- 



C. volts/em. om. cm. seo. mm. cm./sec. cm /sec. cm./sec. 



AMMONIA. 



13 



15 

 13 



38-7 



19-3 



38-7 



19-3 



Mean values of k m ( P sit j ve ion ' J* cm '/ sec - 

 ]_ negative 0-80 



ALDEHYDE. 



54-8 



AT c , f positive ion 0'31 cm. /sec. 



Mean values of* | Negative 0-30 ,, 



0-32 

 0-29 



0-31 



0-31 



0-29 



0-33 

 0-32 



0-31 



0-31 



0-28 

 0-30 



0-28 



0-30 

 0-31 



0-31 

 0-30 



ETHYL ALCOHOL. 



16 



9-7 



7-7 



9-7 



54-8 



, c , f positive ion 0-34 cm./sec. 

 Mean values of *r ( egative -27 ,, 



0-34 

 0-34 



0-34 



0-35 



0-29 



0-26 



0-26 

 0-28 



