38 



M A Q N E TIC S U II V E Y F P E N N S YL V A MA. 



Azimuth of Polaris . 



Reading of Polaris . 

 " ;ist. meridian 



" magnetic meridian 



Magnetic declination W. 



2° 02'. 2 

 238 19.2 

 236 110 

 233 41.3 



2 35.7 



Abstract of Observations for time. Aug. l"». 



Mean of chron. times 



" observed double alt 



True altitude 



Hour angle . 



K. A. of star 



Siil. time 



Corresponding mean time 



Chron. fast . 



Mean 



0" I5 m 32 s . 6 



Abstract of Observations for Latitude. Aug. 15. 



Chron. lime . 

 Observed double alt. 

 True altitude 

 Mean time . 

 Correspond, sid. time 

 K. A. of star 

 Eour angle . 

 Latitude 



Mean 



42° 18' 06' 



Bath.— Aug. 19, 1841. Lat. 42° 20'.8; long. 77° 21'. 

 Abstract of Declination Observations. 



N. oud. 



47.9 E. 



43.2 E. 



i) 26.6 B. 



(i 26.6 B. 



_0 36. 1 



S, rlli!. 



1 23.7 B. 



1 21.9 E. 



1 25.4 E. 



1 27.5 E. 



+ 1 24.6 



+ 24.2 



Azimuth circle reads, 



= +0° 05'.8 

 312 47.2 



Magnetic meridian reads, 312 53.0 

 Abstract of Observations I'm- Azimuth of Polaris. 



Mean of times 



Mean circle reading . 



< !hron. last 



Mean time of Observation 



Corresponding sid. time 



11. A. i^' Polaris 



Hour angle 



9 h 26 m 37". 4 

 318° 29' 10" 



o 1 ' in 1 " him; 



9 16 20.x 



l'.l (I'.l 22 1 



1 02 58.6 



18 or, 23.5 



