43 2 CORRECTIONS OF 



XXVI. 



CORRECTIONS 



OF THE 



Lunar Method of finding the Longitude* 

 By Mr. REUBEN BURROW. 



^HE intent of the following remarks is to point out 



t an nu r r° r in - the Ufual Praaice of m ^ing the 

 Lunar Obfervations, and another in the Method of 

 Computation. 



It is well known that a little before and after the 

 conjunction, the whole hemifphere of the Moon is vifi- 

 ble, and the enlightened crefcent feems to extend fome 

 diftance beyond the dufky part. Now, having deter- 

 mined the longitude of a place from the eelipfes of 



JuKT S ? a , tell ! te r S ' * took leveral fos of diffances of 

 the Moon s limb from a Star near the time of the con- 

 junQion, both from the bright and the dufky parts of 

 the circumference, and having calculated the remits, I 

 found that thofe taken from the dufky part were much 

 nearer the truth than the others. The nature of the 

 error evidently mewed, that the ftar had really been at 

 fome diftance from the limb when it appeared to be in 

 contaflt with it; and, as the error was a confutable 

 part of a degree, I faw it would be of confequence to 

 difcover the caufe of it; which, however, was obvious 

 enough from ^fc»'iprinciples,andmay be explained 



Let 



