918 Mr. A. Gr. Shenstone on the Effect of an 



It was proved that the effect was not dependent on the 

 light by making a few runs with the plate screened, except 

 when the readings were being taken. 



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Current through Plate in Amperes 

 Bismuth plate, cross-section 0-112 cm. 2 



When high currents were being used, readings were 

 always taken with the current shut off, in order to eliminate 

 the effect of the magnetic field. 



After the preliminary work it was determined to try to 

 obtain complete curves of the dependence of the photo- 

 electric current maxima on the current through the plate. 



3-Q. 



