IN PHYSICAL ASTRONOMY, 13 
+ j — W+* 3 } + j|si 47 ]y 2 e 2 cos (2a? — 2y) 
[77] 
+ -g-s i4 7 y~e -cos (2x + 2 y) + -4- ^ 3 f — ^a M7 | y 2 e 2 cos (2 < - 2x - 2y) 
[78] [79] 
— — r 3 ' y 2 e- cos (2 t — 2 x + 2 y) — — s I47 y 3 e- cos (2 t + 2 x — 2 y) 
8 [80] ^ [81] 
+ {- ^jW+M — I' 1 ' 5 ' - y| s i4 7 }y 2ee / c os (x + z-2y) 
[83] 
+ { + -|- r 5' — ^ S ‘ 4 7 }y 2e e /C0s(a? + 2 + 2y) 
[84] 
+ { + y^ r s f ~ |-{* , 5 ' + M — «i4 7 ^ y~ee l cos (2t — x — z — 2 y) 
[85] 
+ ^,r 3 'y°-ee / cos (2 t — x — z + 2y) 
[ 86 ] 
+ { — -§-{ r 5 r -^5} ~-|-Si4 7 }y 2 ee / cos (2t + a? + s — 2y) 
[87] 
+ {+y^ W + M -|' r 5 , + ^«H 7 }y 2 ee / cos (x-z-2y) 
[89] 
+ { + ¥ nf + x^ s w]y 2ee / cos ( x - z + 2 ^) 
[90] 
+ ^ + jg r ) -g- { r J — "g" s h 7 j y' ee i cos ( 2 ^ x z — 2 y) 
[91] 
+ ^ r 3 ’ y 3 e e t cos (2 t — a; + z + 2 ?/) 
[92] 
+ j- -|{*V + M- |-s 1 4 7 }y 2 ee / cos(2i + X-2-2?/) 
[93] 
+ {+ ^r 5 ' + flsi 47 jy 2 ^ 2 cos (2z- 2y) + ^r 5 'y*e*cos(2z-2y) 
[95] [96] 
Development 
of § R. 
