MAGNETIC OBSERVATIONS 



Summary of observations of magnetic intensity at Alger Island — Continued 



357 



Date 



, 1905 

 June 26 



27 



July 10 



II 



17 

 18 



24 

 25 



Effect 90° 

 torsion v 



/ 



19-52 



19-75 

 18.10 

 18.62 

 17-63 

 17.12 

 16.92 

 19.30 



log 



m [H+X) 



46503 

 46561 

 46674 

 46387 

 46781 

 46568 

 46887 

 46549 



\ogm^ 



2.64078 

 2.64283 

 2.64115 

 2.64187 

 2.64180 

 2.64340 

 2.64391 

 2.64541 



log m^ 



2.63896 

 2.64147 

 2.63991 

 2.64060 

 2.63983 

 2.64154 

 2.64180 

 2.64333 



Observer 



W. J. P. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 



From these results the mean value of the magnetic horizontal intensity at Alger Island, 

 practically applying to mean of day, is 



7J6J r for the epoch 1905.53. 



Summary of Magnetic EIvBments at Alger Island 



The following shows in one view the mean results obtained by the expedition at the 

 Alger Island station, all the values applying practically to mean of day : 



Latitude of station is 81 21.5 N. 

 Longitude of station is 56 05.5 E. 



