326 Mr. G. U. Yule on the Passage of Oscillator 



which is the ordinary expression for the ray transmitted 

 through a thin plate. 



The general expression (49) is too complex to allow of an 

 offhand statement of its form. One case was, however, 

 worked out in full arithmetically. The values of the chief 

 constants chosen were 



^=70 



sp. resistance of electrolyte = 5100 ohm-centim., 

 log. decrement of wave-train = 0'4, 

 wave-length = Xj= 9 metres. 



These gave the following values for some of our symbols : — 



X=86°21'26", 

 6= 8° 44' 57", 



*rf=-^ (-673402), 

 p 1 £ 2 =3 , 3676 —j 



A L 



» 2 f 2 = 3017°-825 ^, 

 £ = •78705, c/=-38167, 

 log f =1-8960008-^- (3-21751421), 



A x 



log ©f =1-9920016- ^ (3-5099681), 



Aj 



f = 1°3' 26", >fr' = 28' 17", 



^ = 1-0018. 



The phase-changes at both surfaces are in this case so small 

 that one would not expect any great shifting of the maxima 

 in the transmission-cuiwe, (1) (fig. 3) : the maxima appear 

 to occur rather early, but one can hardly say more. 1 find 

 (49) too complex to get anything out of it by differentiation. 



