544 PROFESSOR KELLAND ON THE THEORY OF WAVES. 



.87686 



= 16 nearly 

 c = 4 

 hence, in nine seconds, 36 feet ought to be described, whilst the result of obser- 

 vation is 40. 



Wave in Mr Russell's memoir, entitled " Researches in Hydrodynamics," 

 Trans. Royal Soc. Edin. vol. xiv. 



h=13, 2e=-2:2 

 X=27r/<-4.4 



^=(3?|Iii(2..-4.4)P^(l-|^L-iHip) 



2 TT \ 2 TT /( — 4.4 / 



iTTk _ 2 



'~27rA-4.4~ j_2^ 



= 2 1061 



1-: '•' 



(3.1416) (13) 

 1.21.55-1 72155 



^2.. +1 8.2155 + 1 9.2155 



.78297 



