on the Ions produced in Air by Rontgen-Rays. 437 



series is not necessarily affected by any error due to these 

 variations. 



The following tables contain all the other results obtained 

 except a few done at an early stage, before the apparatus 

 had been got to work satisfactorily, none of which are 

 included. 



d = 0-50 cm. 



^ = 0-50 



cm. 



P.D. = 2000 volts. 



P.D. = 2000 volts. 



ti. 



t . 



t x . 



t 2 . 



(X=0.) 



(X = +13-3.) 



(X=0.) 



(X=+13-3.) 



sees. 



sees. 



sees. 



sees. 



12-2 



9*6 



18-3 



10-8 



in 



9-3 



20-3 



15-6 



11-4 



9*3 



18-2 



17-6 



12-0 



9-2 



18-0 



13-8 



10-6 



9-6 



18-4 



15-4 



Mean 11*4 



Mean 9-4 



Mean 18-64 Mean 14-64 



Vl = 0-0439 



v 2 =0*0530 



■ h=0'0268 V2 = 0-0341 



m = 2-86X'10- u 



m = l-36xl0- n 



e = 4'37xl0- 10 . 



6 = 2-73 xlO- 10 



d=0 



5 cm. 



d=0-55 



cm. 



P.D. = 2000 volts. 



P.D. = 2000 volts. 



k- 



u. 



t x . 



to. 



(X=0.) 



(X=+13-3.) 



(X=0.) 



(X=+12-l.) 



sees. 



sees. 



sees. 



sees. 



14-9 



13-2 



15-6 



13-0 



15-0 



11-4 



17-2 



12-8 



14-9 



12-2 



16-0 



12-4 



14-0 



10-7 



17-0 



13-8 









17-4 



14-1 



Mean 14- 7 



Mean 11-87 



18-4 



15-0 



v 1 = 0-034 



vo =0-042 



17-2 



14-1 



m=l'95x\0- n 



16-0 



12-8 



6 = 3-4 



x 10- 10 . 



16-9 



13-1 







16-7 



12-6 







Mean 16-84 ]\] 



.ean 13*37 







^ = 0-0327 i 



. = 0-0411 







m = l*83 x 



io- n 







6 = 3-81x 



: lO" 10 - 



Phil. Mag. S. 6. Vol. 5, No, 28. April 1903. 



