A TEST FOR ELECTRON POLARIZATION 



473 



degrees in our earlier experiments on the single reflection of electrons 

 incident in the {lllj-azimuth. The locations of the maxima of this 

 curve are indicated in a diagram which forms a part of a report of these 

 experiments.^ 



160 



BOMBARDING POTENTIAL- VOLTS 



Fig. 4 — Variation with bombarding potential of the intensity of beams reflected 

 at 45°. Curve A is the doubly reflected beam of this experiment. Curve B is the 

 singly reflected beam previously reported. {Proc. Nat. Acad., loc. cit.) 



The agreement between the curves of Fig. 4 is on the whole satis- 

 factory; each displays three maxima in the voltage range common to 

 both, two of which occur at the same voltages in Curve A as in Curve 

 B. The voltages at which the third maxima occur — those on the ex- 



5 C. J. Davisson and L. H. Germer, Proc. Nat. Acad. Set., 14, 619 (1928), Fig. 3. 



