Needle of a Quadrant Electrometer. 



449 



The accompanying table (Table I.) and curve A represent 

 the results of an experiment made with the instrument 

 already referred to. 



Table I. 



Time 

 (seconds). 



Deflexion. 



Time 



(seconds). 



Deflexion. 



1 







o 



6 



9 

 12 

 15 

 18 

 21 







5-8 

 28-9 

 54-7 

 71-7 

 87-2 

 104-2 

 1203 



24 



27 

 30 

 33 

 36 

 39 

 42 



135-7 

 150-2 

 164-3 

 177-6 

 190-2 

 202-3 

 214-2 



20 



£ ISO 



2 '00 



Case wkere ?-(t) is of tke j-orm. T(t-e~ ) 



Carve A represents tke. ach 

 Curve B represents Ike Icle 



Time in. Seconds 



The quadrant was connected through a Yerj high resistance 

 to one pole of a battery consisting of two cadmium cells in 



