OP ARTS AND SCIENCES : SEPTEMBER 12, 1865. 11 



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In this last form it was necessary to add the small constant G to A 

 in order to obtain small and convenient numerical coefficients of the 

 constant 6 G. 



The following is an application of the last form to the example of 

 the moon's Eight Ascension already given. From (13) we obtain, 

 putting <a = 12, 



A+G B 6 G 



