[ 214 ] 



A. R. correfponding to the moon's rate and the eftimate lon- 

 gitude, and C the corredion required. 



Then H : S : : L+D : D & H : S : : D : C. 

 Or H-S : S :: L : D. 



Confequently d = ^-g or D = j^— x ^_^= -^X . +|+, 



&c. 



&5g'=c. 



TABLE I. 



Corre&ions of the apparent differences of the dijlances of the moons 

 limb from a far, as obferved on the fame day under different meri- 

 dians, in parts offydereal time. 



This 



