MR. LUBBOCK ON THE THEORY OF THE MOON. 141 



in the development of R, 



_ ^^ I ^ I i^ I gZ ^^^ 18 30 30 204 _ 1107 

 ~ 16 "• 64 "»■ 16 "'" 32 16 "T" 32 "• 8 "*" 32 ' 16 ~ 64 * 



369 21 153 



The coefficient in question = -gj = y x ~^. 



But I have found that the following corrections are required. For 



+ 1 1 1 - 4 e' - 4 e;j cos^^ ~ e, cos (2 r + Q 



[7] 

 read 



+ ¥{^ - T^'-^} cos4i^^/COs(2r + |J 

 and for 



-6i$<y'^^s^2i,-2;,)-|^3e;/cos(2|, + 2^)-^Je;/cos(2r--2|-2,) 



[95] ' [96] [97] 



read 



-Tg^3e;/cos(2f,-2p,)-?^e;/cos(2|, + 2^)-^J;3e;/cos (2 7-21,-2;,). 



