274 Mr. Bowditch on the solar eclipse, Sept. 17, 1811. 
At New York, Columbia College, by Dr. Kemp, Sept. 17, 1811. 
The latitude of the place of observation 40° 42’ 45” N, reduced 40° 
31 24", 
App.time. ()-Q©) Par.long. Par. lat. > aug. S. D. 
Beginning OA. 38’ 53” 6 26'°7 oo 13° °3 14’ 53-23 
End 3 4749 —I7 33°1 A5 04 °6 14 48 *71 
Hence the apparent time of conjunction was at 2h, 1’ 22’-9 appar- 
ent time, which subtracted from 6/4. 57’ 6”*1 gives the longitude of 
Columbia College New York 4A. 55’ 43-2 by this observation. Mr. 
Garnett’s observation at New Brunswick made the longitude 4/: 57 
56"°6, from which subtracting the difference of meridians between 
that place and Columbia College 1’ 51:3 in time (as computed from 
the survey of the Post Roads by Seth Pease Esq. corrected at the ex- 
treme points by Mr. Garnett) gives the longitude of Columbia Col- 
lege by observation 4h.. 56’ 5/3. 
‘Mr, Ferrer, by a chronometer, found the longitude of Kinderhook, 
where the solar eclipse of 1806 was observed, 513 E from his 
house in Partition Street, New York, and Albany 58” E from the 
same house. These correspond to 51”0 and 57’*7 in time E from 
Columbia College, and by adding these respectively to the longitudes 
of Kinderhook and Albany computed in this paper from the eclipse 
of 1806, viz. 44. 55’ 9G and 4h, 54’ 59’3, give the longitude of Co- 
lumbia College by these observations 4h. 56’ 0-6 and 4h. 55’ 570» 
By the solar eclipse of June 26, 1805, computed in this memoir, 
the longitude of Columbia College is 4h, 56’ 14’8, 
The mean of these five observations gives the longitude of Colum- 
bia College 44, 56’ 002 W from Greenwich, being 2’-8 less than 
the estimate of Mr. Ferrer in vol. vi. p- 360, of the Transactions of 
the American Philosophical Society of Philadelphia. 
