Experiments on Positive Rays. 247 



possibly be due to a part of the peak ascribed to the oxygen 

 atom being in reality due to molecules of water-vapour, the 

 slit being hardly fine enough to separate values of m/e as 

 close together as 16 and 18. 



Eur. 24. 





i 



1 } 



' i 



i ! 



! II 









,1* U 



2*0xy 



r cgen 

 £>en 





i 











i 



1 



V 









| 



i | 



1 



\ ! 



i ! 



\ 1 







| 



ft 



11 i ; ! 







r 





! 



1 



*N 



| 



..J 



1 A' \j 



r- -> 



i I 



CO. 



Fig. 25. 





i 



„ i 

 2.^ Hy d r o g e n 



f Oxygen. 









i 





» 







1 



k 



h 



X I 



H 1 



H 2 



2. 



J G 



^l 



5 co 2 



The negatively- charged hydrogen atoms seem to have the 

 rsame preponderance in their effect on the photographic plate 



