i^OL,A^—3fobilMf;s of Ions Produced by Spraying. 



19 



not affected within the range of experiment by the rate at which the air is 

 drawn from the sprayer. The positive ions have not been examined as fully, 

 but there does not seem to be any ground for making distinction between the 

 signs. At least one reliable observation has been obtained of each class of 

 positive ions, excepting Class 12. If this ion exists with a positive charge, 

 it must exist in very small quantities. The quantity of positive ions of 

 Group 11 (mobility = 3) observed was very small, and was found only in one 

 experiment. 



Determination of the Molilities. 

 The following table gives the values of mobility deduced from every 

 experiment that was performed : — 



- Table V. 

 Mohilities of the more Mobile Groups. 



6 



7 



8 



9 



10 



11 



12 





•12* 



■20* 



•51* M3* 



1-4* 



3^0* 



n■^ 





•13* 



20* 



■51* 1-04 



1^56* 



3-12* 



6-2 





■09 



•24* 



•53* 



ro8 



r56* 



2^8 



6^5 





■14 



•24* 



•53* 



1-08 



1^56* 



2-9 



7-1 







■27* 



•57* 



MO 



r56* 



3^1 



7-2 







■29* 



•39 



MO 



P60* 



3-12 



6^5? 







■19 



■39 



Ml 



1^62* 



3^25 



8? 







•22 



•43 



M2 



^62* 



3^5 



9? 







•22 



•45 



■96? 



1^44 



3^6 









■27 



•53 



1 ^22 ? 



ToO 



3^7 









■28 



•54 

 •55 

 •55 

 •60 





1^90 

 1-90 

 1^30 ? 

 VoO ? 



3'9 

 3-0 r 

 3-0 ? 











- 



•67* 













- 



•67* 











UnclassiBed Mobilities, - 



■t 

 \ + 



•80* 



•84 



2^30 







Means, 



•12 



•24 



•53 



1^09 



1-56 



^■27 



6^5 



[3* 



