62 



Prof. J. A. Fleming on the 



The results of this Table No. 3 are plotted in the curves 

 No. 3. These curves are to be interpreted as follows : — The 

 two vertical lines P and N represent the two legs of the 



Table No. 3.— Curve No. 3. 



The middle plate was moved along- into different positions between the 

 two carbon legs indicated by the horizontal distances, and at each 

 position the current between the middle plate and positive electrode of 

 the lamp is represented by the vertical ordinate of a carve. The several 

 curves correspond to different working volts on the lamp. 



+Leg 1/10 1/4 1/2 3/4 



Position of Plate between legs. 



9/10 —Leg 



carbon horse- shoe. At various distances on the way from P 

 to N the milliampere current through a galvanometer con- 

 nected between the middle plate, placed at that point, and the 



