IN PHYSICAL ASTRONOMY. 
13 
+ {- A{ r s'+M + J|«H 7 }y 2e2cos (2a?- 2 y) 
[77] 
+ ~Si 4 7 7° e ° cos (2x+ 2y) + ^ 3 f — } y"e 2 cos (2 t - 2x - 2 y) 
[78] [79] 
— A r 3 'y°- e °cos (2t — 2x + 2y) — A s U7 y°- e°- cos (2 i + 2x — 2y) 
[80] [81] 
+ { - ~ r 5 f — [^ Si4 7 1 y 2 e e i cos ( x + z — % y) 
[83] 
+ | + Ar 5 ' — A s 147 1 y2 ee/ cos (x + z + 2y) 
[84] 
+ { + ^ r 3 ,_ §-{A + A 5 } — As 147 jy2 ee(COS (2 f-a:— z — 2y) 
[85] 
+ A rjytee, cos (2 t — x — z + 2y) 
[86] 
+ {— A{r 5 ’ — X 5 } — -|-s 147 j y 2ee / cos (2t + x + z-2y) 
[87] 
+ j+J^W + M - + ^Si4 7 }y 2ee / cos (a? — 2 — 2y) 
[89] 
+ { + f' r5f + Tb s H 7 }y 2 ee / c °s (x — z + 2y) 
[90] 
+ {+ W ~ M ~ -jj- s i 4 7 | y 2 ee / cos (2t — x + z — 2y) 
[91] 
+ A rjyzee, cos (2t—x + z + 2y) 
[92] 
+ {- -| {r 5 ' + A 5 }~ As 147 |y 2 ee ( cos(2i + x-z-2 2 /) 
[93] 
+ { + A r 5 ' + A s 147 } y 2 e ? cos (2 2 - 2 y) + — r i y* e * cos (2 z - 2 y) 
[95] [96] 
Development 
of J/?. 
