Development 
of $ d H, 
20 
MR. LUBBOCK’S RESEARCHES 
2.16 
43 
+ { - ^ r i + r 3 ' | y°- e cos (2 t - x + 2 y) 
[63] 
+ | — r/ - JL s 147 1 y°- e cos (2 t + x — 2 ?/) + r/ y 2 e cos (2 t + x + 2 y) 
[69] 
[70] 
+ { + iy { r '+ Xi } ~ if r *' “ ¥ 'wjy* e cos (2 - 2 
[71] 
+ { + ^ { r/+Xl } “ if r5 ' + y 5147 } y2e/ cos ( z + 2 y) 
[72] 
+ {+ ^y r i' + % r >~\ ^ e / C0S (2 < - * - 2 y) + r 1 'y 2 e / cos(2<-r + 2y) 
[73] [74] 
2 ’ 9 V ~ff { rb ' + } + T Sl47 } y9e ‘ cos( - 2t + z ~ 2 
+ < + 76- r 
+ ~r,y2 e ,cos (2t+z + 2y) 
[76] 
of 2.5.3/ ,.1 2.3/3 , . 1 . 1,2.45.3 0 / , , . 1 
+ ^{““yy^u 1 + x, j +_ 8iy r ‘ + T Ai ) + i6T2“ e ' r 3 + 3 / 
2 . 15 
16 ‘ 
{f'>' + y*}-.4‘*{4 r ‘' + ib} 
+ r e ' , {l r > ,+ T^}} COSI 
[ 101 ] 
a/ 2.45.3/ ^j 2.3/3, 1*1 
+ ^j + yyyrr i+x '/"~Tyiy r ‘ + y M 
+ r s + } | e cos (f — x) 
[ 102 ] 
a f 2.15.3 / , , . 1 2.15/3 f l.\ 
^{-nyy-T* +M-yHy ri + yM 
- 2 8 5 2 ~~ { rj ' + Xj } | e cos(< + a?) 
[103] 
, af 2.25.3/ , , . 1,2.3/3 ,, 1 . \ 
+ ^{~-8T2-l r/ + M + T 12 '* + y Al / 
