ON mi: LONGITUDE OF WASHINGTON. 



•..Mo 



WASHINGTON AND EDINBURGH. 

 Moon's second limb. 



Twenty-three corresponding observations of the second limb, the mean resulting cor- 

 rection from which, by weight, is 



— V .57. 



Eighty-seven corresponding observations of both limbs giving a mean correction, by 

 weight, of 



— r S .86. 



