* 
Eclipse of the sun of June 26, 1805. 
a The beginning of this eclipse was noted at Philadelphia, Lancas- 
ter, and New York. No observations were made to determine the 
error of the moon’s tabular latitude, but it is probable from the fol- 
lowing calculation, that this would not much affect the computed dif- 
ference of meridians between those places, so that the longitude of 
New York may be obtained by these observations to a considerable 
degree of accuracy, by means of the longitudes of Philadelphia and 
Lancaster, computed in the former part of this memoir. 
The observation at Philadelphia was made by Professor Patterson 
at 64. 47/ 40-5 apparent time, in the latitude of 39° 57’ 2", longitude 
5h. 0' 41”-1 W from Greenwich. The corresponding apparent time 
at Greenwich was 114. 48’ 21"°6, when by the tables of Delambre 
and Burg, the elements were as follows. 
O's longitude from apparent egines: - - - 9448 30°5 
>’s longitude - . - 95 08 27°0 
)’s latitude north Pree’ - . - : ~) 62230 
©’s horary motion in longitu - oe on 2 23-0. 
> ’s h motion in ee - om = 87 S844 
’s horary motion in latitude . . - - 3 26°66 
"Slee decrement ) hor. ae long. oy cufiste ner at OVA 
Horary increment ) hor. mot. lat. bc eimtca , = - 0:46 
(9—0) horizontal parallax fo, Philadelphia - - 61 04-72 
-)’s semidiameter — inflexion 2” + aug. 2 . - 2... 16 43°95 
©’s semidiameter — [radiation 3"°5 - . + 15 42°05 
©’s right ascension - - - ¢ 6h. 20575 . 
()—©) Par. in long. ot ees eo eS -  —44 S11 
Q-—0) Par. in lat. - - - - . 41 18°7 
Hence the conjunction at Philadelphia was at 64. 14116, cor- 
responding to 11h. 14 52"°7 apparent time at Greenwich. © An in 
crease of 1” in the moon’s latitude would decrease this 1°44. n e 
if the correction to be added to the moon’s tabular latitude be / sec- 
onds, the apparent time at Greenwich will be at 114. 14’ 52-7 — 
1”44:/, by this observation. 
