PROFESSOR KELLAND ON THE THEORY OF WAVES. 

 2-2//A + /X 2 (y* + 2 h y + _2A 2 ) 



133 



fJL(o + n) 



The simple inspection of these formulse will shew that they will afford no 

 new terms in $ except those which are introduced by cos fj. \/g (z + A) . /. 



But for instead of ev + e -M+, we have 



dy 



therefore the coeflBcient which involves y and b is 



and -jZ is reduced to 

 ff 



rfrf) 







dy 



rfrf) *\/^ /*" sinua a' + sinua' 



^s ~ " / - - - - - 



TT Jo (J.J/J. 



u JLt X 



P ' 



denoting 



. t by p. 





VOL. XV. PART 1. 



N 



