214 Mr. M. Isirino on Velocity of Secondary Cathode Rays 

 Table II. — Hydrogen. 



Velocity of ! 



1 5,500 ' 



11,400 



7500 



Primary Rays. 



volts. 



volts. 



volts. 



volts. 









v=0 



100-0 



100-0 



100-0 



0-3 



95-1 



95-5 



97-0 



0-5 



84-5 



85-0 



85-5 



07 < 



761 



790 



776 



1-0 



66-0 



662 



660 



1-5 



58-4 



56-0 



57-9 



2-0 



52-3 



51-5 



52-1 



2-5 



48-8 



47-7 



45-8 



3 



41-3 



44-3 



42-8 



4 



394 



39-3 



391 



5 



356 



35-8 



36-2 



() 



34-2 



32-2 



34-4 



7 



31-6 



30-0 



31-3 



8 



29-1 



28'2 



28-5 



10 



25-4 



20-6 



236 



14 



221 



20-6 



202 



20 



. 17-6 



17-4 



17-4 



30 



16-5 



14-8 



134 



40 



14-2 



12-7 



11-4 



70 



110 



9-62 



8-50 



110 



9-53 



8-41 



7-25 



150 



915 



7-58 



6-34 



190 



8-52 



7-24 



5-83 



230 



8-37 



6-91 



5-68 



270 



8-05 



674 



5-47 



310 



7-93 



6-67 



5-23 



390 



7-77 



6-35 



5-04 



490 



7-59 



6-21 



4-91 



590 



7-45 



6-04 



4-71 



690 



7-20 



6-03 



4-50 



790 



705 



5-68 



4-40 



990 



6-90 



5-53 



4-20 



1190 



6-72 



5-38 



4-18 



1390 



6-75 



5-54 



4-16 



1590 



6-69 



5-38 



4-15 



1990 



6-70 



5-38 



4-15 



Again, if they are due to the ionization o£ the residual gas 

 by corpuscles of large velocities or Rontgen rays, they 

 should increase with very large values of v ; which was also 

 not observed. 



The primary rays strike the gas molecules in their paths, 

 and by these bombardments they may produce Rontgen ravs 

 of some hardness. The Rontgen rays would strike the 



