760 Prof. R. A. Miilikan and Mr. H. Fletcher on the 



series of speeds. For convenience of observation, therefore, 

 the following readings were all made with a stop-watch 

 rather than with a chronograph. The observational errors 

 in the timings may be two or three tenths of a second. 

 Table I. is a good illustration of the character of the obser- 

 vations. The time of fall under gravity recorded in the 



Table I. 



Plate Distance 1*6 cm. Distance of Pall -097 



5 cm. 



Volts 



1015 



Terapei 



ature 23° C. Eadius of Drop '000063 cm. 



• 





No. of 



No. of 







No. of 



No. of 



9- 



F. 



charges 



charges on 



9- 



F. 



charges 



charges on 







on drop. 



ion caught. 



: 20-0 





on drop. 



ion caught. 



\ 19-0 



luoo 



1 P 



1 P 

 1 P 



10-0* 



1 N 



1 P 

 1 P 

 1 N 

 1 P 

 1 P 

 1 P 





160 



2 P 





20-0* 









8-0 



3 P 





100-0 



1 P 













20-0* 







200 



160 



2 P 



1 P 





100-0 



1 p 





8-0 



3 P 





160 



2 P 













8-0 



3 P 





100-0 



1 P 



1 P 

 1 P 

 1 P 











170 



2 P 



1 1040 



1 P 



1 P 

 1 P 

 1 P 





8-2 



3 P 



15-0 



2 P 





60 



4 P 



9-0 



3 P 











! 60 



4 P 





7 0* 



2 N 



1 P 



1 N 











9-8* 



1 N 



6-5* 



2 N 



1 P 

 1 P 1 

 1 P 

 1 P 

 1 P 

 1 P 





7-0* 



2 N 



10-0* 



1 N 











20 0* 







21-0 



20-0* 







1 P 

 1 P 

 1 P 

 1 P 



100-0 



1 P 





950 



1 P 



15-5 



2 P 



j 



16-5 



2 P 



8-0 



3 P 





8-0 



3 P 



6-0 



4 P 





6-0 



4 P 

















100-0 



1 P 



1 P 





100-0 



1 P 



1 P 

 1 P 



16-5 



2 P 



| 



16 



2 P 



1 









8-4 



3 P 





20-0* 







1 P 

 1 P 

 1 P 

 1 P 













100 



1 P 



; 20-0 



106*0 



1 P 



1 P 





16-6 



2 P 



1 



16-0 



2 P 





8-8 



3 P 





8-4 



3 P 





5-7 



4 r 





10-0* 



1 N 



1 P 

 1 P 

 1 P 



1 P 

 1 P 



' 100-0 



1 P 



1 N 



1 N 

 1 P 





20-0* 







200* 









10U-0 



1 P 



100* 



1 N 





16-0 

 1000 



2 P 

 1 P 



20 0* 















16-0 



2 P 



44 catches, all 



singles. 





8 



3 P 







