28 Observations on the eclipse of the sun, June, 16, 1806. 
as the error in latitude deduced from the observations at the southern 
Renee the shadow. 
The eclipse was not total at Nantucket in the latitude of A 1° 15’ 82” 
N and in the longitude of 4h. 40'0” W from Greenwich, as was ob- 
served by Mr. Walter Folger jun. The only deduction I have made 
from this observation is, that the error in the tabular latitude was less 
than 20”. = 
By taking the mean of the error in latitude determined at the north- 
ern limit, namely —7""2, and that at the southern limit —6”-6, we 
have the error of the tables in latitude as determined by the mean of 
all the observations —6""9. The quantity thus determined is (as was. 
before sgbgerved) a of any error in the estimated values of 
the of the sun and moon. Now in the former part of 
: aie weer ‘was showil that it 11h. 30" 14” mean time at Salem, the 
moon’s latitude by the tables was 19’ 50-3 N, and the horary decrease 
of jatitude corresponding to the middle time between 11h. 30’ 14” and 
the conjunction, 11h. 37’ 20"7, was 3’23"-63. Hence at the time of 
the conjunction the latitude by the tables was 19’ 26’"2, and asthe cor- 
rection obtained above was —6’*9, the true latitude at the time of 
the ecliptic conjunction was by these observations 19’ 193. This 
jatitude will be made use of in the rest of this memoir, in calculating 
several observations made in this country. 
OBSERVATIONS AT SALEM. 
~ FROM the calculations before made on the observations at Salem 
we may easily deduce from the observed beginning y» Mean time- 
and end of the eclipse, that the: reNe cinco Uh. 37’ 1972 
wasat—. - - - Ni 
And by the Sa RR tS ate it Bk otc, ee 
Poe mee ee eae eee ll 37 20°7 
ecliptic conjunction at Salem . , 
