MAGNETICAL OBSERVATIONS. 



39 



Absolute magnetic declination. True azimuth of the mark A. 



1857. January 26, A. M. Small theodolite. 



CIRCLE TO THE RIGHT. 



Object. 



Chronometer. 



Mark A 



Mark A 



O 1st limb 



O lid limb 



O 1st limb 



G lid limb 



Mark A 



JIark A 



7'' 50"" 54» 



53 11 



56 32 



58 33 



Circle readi 



ing. 



303° 

 303 



276 



267 

 266 

 267 

 268 

 267 

 268 

 267 



303 

 303 



41'.0 

 23 3 

 38.5 

 41.5 

 23.0 

 38.5 

 32 

 15.5 

 24.5 

 14.0 

 59.9 



6.0 

 13.5 

 56.0 



4.0 

 52.0 

 35.5 

 43.0 

 44.5 

 25.5 

 40.0 

 44.5 

 25.0 

 40.0 



CIRCLE TO THE LEFT. 



Object. 



Mark A 

 Mark A 

 O 1st limb 

 O 1st limb 

 O lid limb 

 O lid limb. 

 Mark A 

 Mark A 



Chronometer. 



^h 15m 73 



16 58 



19 



20 46 



Circle reading. 



303° 



303 



270 



270 



270 



270 



303 



303 



39'.0 

 18.5 

 38.0 

 39.0 

 19.0 

 38.5 

 28 5 

 11.0 

 22.0 

 42 

 27.0 

 380 

 23 

 7.5 

 180 

 38.0 

 22.0 

 32 

 415 

 22 

 40.0 

 42.0 

 23.0 

 39.0 



