.m \ a .\ 1: tic s r k v i: v 1 1 r p i; n .\ s v l v a n i a 



liECATl'J I I.A1 Icj.n OS I M: I I; \ i,h LaXITI I 'I.. 1841. 



11 



Williamsporl 

 Curwiusvillc 

 Mercer . 

 Erie 

 Dunkirk 

 Bllicottvillc 

 Bath . 

 Silver Lake 



II 14'.0 

 I" .'.7.7 



11 L3.8 

 I -J 



12 29.3 

 I.' hi 

 12 



-II 



Comt arison of Declination for Set ular Changi I:- . ults of 1840-41, and of 1862 



Annual ii 



Philadelphia, Girard College, Julyand Nov., 1841, 3 53'. 7 W. 5° OO'.O W 



Harrisburg, July, Is to, ;; 12.5 " :i 44.5 " 1.5 



Williamsport, July, L841, :; 31.2 " 1 25.7 ' 



Johnson's Tav., near Brownsville, Aug., 1840, 2a.2 " 1 13.6 " 2.2 



Erie Aug., 1841, 30.0 " 1 :::;() " 3.0 



ii:ltl < Au-.. 1841, :; 31.4 " t 17.'.' " 3.r, 



Mean ... 2'. 7 



ETarrisburg was occupied in July, ls<;2, and all the other stations of 1862 in Augu I 



Chronometri/i Results for Longitude, 



In the tour of 1840, the error and rate of chronometer determined at Philadel- 

 phia was depended upon for time. The longitudes of the stations were taken from 

 the hest authorities. 



In the tour of 1841, observations for time were mad.' at stations, and the error 

 of the chronometer was determined at Philadelphia, before setting out, and after 

 return. 



_ 2".03 



July 1 '.t. Corr'n to chron. 

 An-. 30. " " 



-0 h 00 m 06 .0 

 -a a! 31.4 



Williamsport. — July 2s, obs'd corr'n in chron. . 



Corr'n to chron., by rale Philadelphia 



Dill', of lout;-. 



Long, of Williamsport by chron. 



Cl KWINSVILLE. Aug. 1. obs'd corr'n tO chron. 



Corr'n to chron., by rate, Philadelphia 



Diff. of long. 



Loijg. of Curwinsville by chron. 



lam, — .Vug. !». obs'd corr'n to chron 



Corr'n to chron., by rale, Philadelphia 



Diff. of long. .... 



Long, of Erie by chron. 



— h 07 



— (in 21.:; 



(i 07 30.2 

 77° 01'.3 



—0 b 1 I'" 24".0 

 _0 oo 32. I 



n 13 51 6 



7- ! 



— 1 ' 21'" 0| .0 

 _0 00 48.6 



o -jo 15.4 



Aug 11 



AOR. 12 





Dunkirk. — Obs'd corr'n to chron. 



Corr'n to chron. by rale. I'hila. 



Dill', of long. 



Long, of Dunkirk by chron (mean) 



_o u IS 1 " 07". 2 — ii" 18™ 07 .8 —a 1. Is- 

 i 52.7 —a oo :. i 7 — on 56 7 



17 14.5 



17 I'M 

 7'i 27' a 



17 II s 



