RECORD AND RESULTS OP 



Set 1. Observations foe declination, July 10, 1861. 

 The horizontal circle of the declinometer reads in the direction from south 

 towards west. The pointing is upon the axis of the collimator. 



Between 2'' and S^ by chronometer, the collimator magnet read 184° 56' 20" and 

 134° 57' 00", and the azimuth mark B 284° 26' 30" and 26' 30", also C 156° 26' 00" 

 and 26' 40". We have consequently at Qf' A. M. 



180° + collimator, 314° 56'. 7 314° 56'.7 



Mark B, 284 26.5 C, 156 26.3 



30 30.2 158 30.4 



Azimuth of B, W. of N. 142 44.8 Azimuth of C, 270 08.6 



Map-netic declination W. 112 14.6 



111 38.2 

 Mean, = + 111 56 



Set 2. Observations for declination. July 11, 1861. 

 Between S*" 35" and 9'' 35" by chronometer, the collimator magnet read 134° 56' 0" 

 and 56' 40", and the azimuth mark B 284° 26' 10" and 26' 40", also C 156° 26' 40" 

 and 26' 40". Hence for 41'^ P. M. 



180° + collimator, 314° 56'.3 314° 56'.3 



MarkB, 284 26.4 C, 156 26.7 



30 29.9 

 Azimuth B, 142 44.8 



Mao-netic declination W. 112 14.9 



158 29.6 

 Azimuth C, 270 08.6 



111 39.0 

 Mean, = + 111 57 



Correction for diurnal variation to set 1, — 22', and to set 2, — 12 , hence corrected mean + 111° 40'. 



Netlik, Whale Sound. 

 Observations with portable declinometer and theodolite. H. G-. Radcliif, observer. 





Observations for azimuth of mark A. August 4, P. M. 



1861. 





Bearings of the sun. 



Mark or 

 Limb. 



Pocket 

 chronometer. 



Circle. 





Mark or 

 Limb. 



Pocket 

 chronometer. 



Circle. 





A 



01 

 lO 



IQb 44m 45. 

 47 01 



8° 34' 

 71 43 

 71 43 



36' 

 43 

 43 



01 



10 

 A 



48" 28' 

 50 -41 



70° 50' 



70 50 



8 34 



51' 

 51 

 36 



From the astronomical paper we have, for August 4 (P. M.), the pocket chrono- 

 meter correction A 2' = — 4" 41" 54^ 



Observed times of the sun's centre 10'' 45" 53' and lO** 49" 35" by chronometer. 

 The corresponding computed hour angles are 5*" 58" 14' and 6*" 01" 57", and the 

 azimuths 93° 29'. 2 and 94° 23'. 3 (west of south); hence by means of the corre- 

 sponding circle readings 71° 43'. and 70° 50'. 5 in connection with the mean 

 reading of the mark A 8° 35' we obtain the azimuth of the mark. 



156° 37'.2 

 156 38.8 



156 38.0 W. of S. 



