E-39 



49 



-10, 



50O/O 



a 



1st 



100% 

 39-fst 



66!% 



1st 



83iqfe, 



100% 



Fig. 16 _ A series of trails showing the progressive increase in angular deflec- 

 tion with increasing intensity differences between the opposing beams of light 

 H^ach pair of trails coincides with the average deflection of all the trails obtained 

 at the stated differences of intensity; a, equality; b, 8^ per cent difference; c, 16f 

 per cent difference; d, 25 per cent difference; e, 33J per cent difference; /, 50 per 

 cent difference; g, 66| per cent difference; h, 83i per cent difference; i, 100 per 

 cent difference. 



246 



