100 



PROCEEDINGS OF THE AMERICAN ACADEMY 



" The elements of the moon used for the following computations 

 (except the parallax and semidiameter) are the mean of the quantities 

 deduced from the tables of Damoiseau and Burckhardt. Those of the 

 latter were taken from the English and French Nautical Almanacs, 

 but those of Damoiseau were computed for May 26th, 6, 8, 10, and 

 12 hours of Paris, and thence interpolated for every hour of the me- 

 ridian of Greenwich. Whilst the difference of the tables in latitude 

 is small, or about a second and a half, in longitude it is very consider- 

 able, or eleven seconds. For the parallax, that of Burckhardt was pre- 

 ferred, as corrected by Mr. Adams, one of the distinguished discover- 

 ers of the planet Neptune, who, in a memoir affixed to the Nautical 

 Almanac for 1856, appears to have thoroughly investigated the subject. 



Path of the Central Eclipse of the Sun over the Earth, Friday, May 



26, 185-1, according to the Tables of Damoiseau and Burckhardt, 



for every Fifth Minute whilst crossing the North Pacific Ocean, 



and for every Minute of the Remainder of the Time of its Continu- 



ance on the Earth. 



Mean Time at Greenwich. 



* On the meridian of the place. 



