.TEERESTRIAL MAGNETISM. 



699 



observed by Lieutenant Foster at Whalefish Islands, lat. 68° 59', 

 long. 53° 13", in 1824 ; also at Port Kennedy, observed by 

 McClintock 1858-59, lat. 72° 1', long. 94° 19', very near the mag- 

 netic pole, magnetic declination 135° 47'). 



The time of maximum ivest deflection appears to be 1 p.m. for 

 all places in the north magnetic hemisphere. 



The time of the maximum east deflections appears to be subject 

 to disturbances which cause it to vary from 2 a.m. to 9 a.m. 



A westerly magnetic motion of the north end of the needle at 

 Port Foulke or Van Rensselaer Harbour means a change farther 

 from the north on the western side, z.e., a change from a point 

 geographically nearly S.W. to a point more towards the south. ^ : 



Observations for absolute declination were made at 14 stations 

 in various parts of the Polar regions west of Greenland, and the 

 results are recorded in the following table. 



8. Declinations observed by Dr. Hayes. 



Place. 



Latitude. 



Longitude. 



Declination. 



Date. 



Proven - . - 



o / 



72 23 



o / 



55 33 



o / 

 83 24 



Aug. 1860. 



Starr Island 



78 18 



73 6 



109 45 



Oct. „ 



Cairn Point 



78 31 



72 59 



110 9 



April 1871. 



Foggy Camp 



79 55 



71 28 



106 53 



May „ 



Camp Hawks 



79 44 



73 6 



115 38 



• h .. ;::^o' si,. 



cache on Ploe 



79 30 



72 53 



113 52 





Scouse Camp 



79 29 



72 53 



112 6 



Potato Camp 



79 4 



72 30 



105 34 



Camp Separation - 



78 53 



72 8 



105 4 



» -Ji 



Last Camp 



78 38 



72 8 



108 36 





Port Foulke - ■ 



78 18 



73 



111 40 



July „ 



Northumberland Island - 



77 11 



72 20 



106 



Aug. „ 



Netlik 



77 8 



71 22 



106 49 





Upernavik 



72 47 



56 3 



72 12 



„ „1 



Observations for the Horizontal Magnetic Force were made at 

 five stations by Dr. Hayes and at three stations by Dr. Kane, and 

 the results are as follows : — 



Values of Horizontal Force of the Earth. (Sm. Con., vol. xv., 

 p. Q6. Drs. Kane and Hayes.) 



Lat. 



Long. 



Hor. Force. 



Date. 



Cambridge, Massa., - 



Godhavn 



Proven 



Upernavik - 



Netlik 



Port Poulke - 



Cape York - 



Hakkiyt Island 



Van Rensselaer Harbour 



o / 



o / 



42 23 



71 07 



69 12 



53 28 



72 23 



55 33 



72 47 



56 03 



77 08 



71 22 



78 18 



73 00 



76 03 



68 00 



77 23 



73 10 



78 37 



70 53 



July 1860 



Sept. 1861 



Aug. 1860 



1861 



