﻿526 Mr. S. B. McLaren on Emission and Absorption 



determinant A below. Since the constants c's are values of 

 the coordinates at some time A = l, 



. I dq l dp± dq 2 dp 2 dq 3 dp% 



dc± dc x dci dci dt\ dc l 



dq ± dpi 

 dc 2 dc 2 



dqidpi 



dr, dc 3 



There are 2n rows and columns. 

 From the form of A it follows 



s=2n 1 



% £-M„=0. . 



s=l dc s 



S=2?l .1 



s =i dc 8 



And (50) and (51) become 



du r s=1 dc s \ J J 



(52) 

 (53) 



(54) 



(55) 



Consider any function -& oC the ;/s and q's which may 

 also contain the time explicitly. The increment in value 

 Byjr of this function above that which it would have had in 

 the undisturbed motion is given by 



r=1 dprdu r r =i »=i l_dp r dc g \ J / dq r dc 8 \ J J J 



r=idprdv r r=1 s=zl dc s l\ dp r dq r Jj J 



