34 



M A G N E TIC S U R V E V F I» E X N S Y L V A X I A . 



Mercer.— Aug. -1, 1841. Lat. 41° 13'. 8; long. 80° 16'. 

 Abstract of Declination Observations. 



N. end. 



40.1 W. 



38. (i W. 



1 01.4 W. 

 1 05.2 W. 



+ 51.3 



S. end. 

 5G.0 W. 



53.0 W. 

 42.7 W. 

 43.0 W. 



-0 4S.T 



+ 01.3 



Azimuth circle reads, 



= + J 00 .:; 

 220 31.3 



Magnetic meridian reads. 220 31.6 



Abstract of Observations on Jupiter for Latitude. 



Chron. time . 

 Observed double alt. . 

 True altitude 

 Mean time 



Corresponding sid. time 

 K. A. of Jupiter 

 Hour angle . 

 Latitude 



8* 50 m 4S S .7 

 52° 30' 48" 

 26 13 23 



8 h 29 m 35 s 

 17 23 22 

 16 33 50 



49 32 

 41° 13' 45" 



Abstract of Observations for Azimuth of the Sun, Aug. 5. 



Set I. 



ll h 57 m Ol'.O 

 202° 39' 30" 

 ll h 35 m 45 s . 

 11 30 05.6 



17° 02'. 2 

 202 39.5 

 219 41.7 



Mean of times 



Sun's centre reads 



Mean time of observation 



A pp. time 



Azimuth of Sun (from S.) 



Reading of Sun 



ast. meridian 



Mean 

 Corr'n for adjustment, Aug. 5 

 Reading of ast. meridian, Aug. 4 



" magnetic meridian, Aug. 4 



Magnetic declination E. 



Set II. 



l h 05 m 23 s . 

 241° 14' 40" 



u 44m Q.JS J) 



38 28.0 



21° 37'. 7 



241 14.7 



219 37.0 



219° 39'.3 

 + 1.1 



219 40.4 



220 31. G 

 51.2 



Erie.— Aug. 9, 1841. Lat. 42° 07'.5; long. 80° 06'. 

 Abstract of Declination Observations. 



N. end 



44.1 W. 



40.:; W. 



1 01.2 W. 

 1 03.6 W. 



+ 52.3 



S. end. 



50.8 W. 

 59.5 W. 

 59.1 W. 

 48.8 "W. 



—0 54.5 



— 01.1 =—0° 00'.3 



Azimuth circle reads, 192 02.0 



Magnetic meridian reads, 192 01.7 



