448 Archdeacon Pratt on the Undulation of an 



... 2 V! <*--(0-i)o i + g\^(^-o-D0 



-iO<-(/3-l)< 4 > 

 Substitute first approximate values of h in small terms ; 



,. vsc-«(i-^(i-i)>£(i+N). J 



where N = some function of /3, w, and / ; 



--£(•.- W - i)T- Sfc- 5%7 i)> ♦*' w 



-<^)-^.«(i-^(.-£)T-5 



, /. /3-l/ 1 *\ 2 \ m s 



•'• ^ 2 + 2 cA =4 1 -^-( 1 -^J)-8? 



••• by (16), 



A'* + 2e7*' + c' 2 =/3V + (2m + (/3-l)*-/3W* 2 + 2<;A) 2 



From these values of A and A', by the help of (14) I shall 

 obtain the value of c. That equation (14), by means of (1), (2), 

 (15), (12), (6), becomes 



