TABLE I. 



OBSERVATIONS ON THE MAGNETIC-NEEDLE, 



AT CUMBERLAND-HOUSE, HUDSON'S BAY, 



JUNE 11, 1820. 



By LIEUTENANT ROBERT HOOD, R.N. 





In the month of February 1820, an Azimuth Compass was fixed in the open air, with a small minutely-divided 

 metal arch on the edge of the card ; and the diurnal variation of the needle was ascertained as noted in the following 

 table. Many interruptions prevented a more complete series of observations ; and the present will serve only to shew 

 the amount in general, and the direction of the variation. 



EASTERLY VARIATION. 



1 







FEBRUARY, 1820 



► 













MARCH. 







Days. 



9 A.M. 



Noon. 1P.M. 



4 P.M. 



SP.Af. iSP.M. 



Days. 9 A.M. Noon. 1P.M. 4.P.M. 

 1 1 1 1 



8 P.M. 12 P.M. 











1 







^ 







1 ° * 



O / O '1° '1° 1 



i 





_ 

















1 1 17 17 



. . . . 17 14 17 12 17 14 17 16 



1 2 























2 



17 14 



.... 17 11 17 14 17 15 17 16 1 



3 















t 







1 



3 



17 17 I . . . . 1 17 14 1 17 15 I 17 17 1 17 17 



1 4 























4 



17 18 | . • • . j 17 14 1 17 13 J 17 17 f 16 45*| 



5 























5 



17 14 



.... 17 12 17 12| . . . J 17 16 | 



6 























6 



17 14 



.... 17 8 17 8 



17 13 16 38* 



7 























7 



17 13 .... 



17 7 



17 7 



17 10 17 10 



8 























8 



17 13 .... 



17 6 



17 7 



17 10 17 13 1 



9 























9 



17 14 



# • ^ • 



17 8 



17 9 17 11 



17 13 1 



10 























10 



17 14 



« • • « 



17 8 



17 9 



• • • » 



16 35*1 



11 







/ 



o 



/ 







o * 



o / 







/ 



11 



17 14 



• • • . 



17 6 



17 4 



17 8 



17 32 1 



12 



• • 



* * 



17 



8 



• 1 



i • * 



17 8 



• • # • 



17 



10 



12 



17 13 



.... 1 17 8 



17 8 



17 10 



17 12 I 



13 



17 



17 



17 



9 



• i 



» • * 



17 7 



• • * 9 



17 



13 



13 



17 14 



. . . . 17 10 



17 10 



• ♦ • • 



17 13 1 



14 



17 



16 



17 



13 



• 



# • 



17 8 1. . .. 



17 



11 



14 



17 15 



... .{ 17 10 



17 12 



17 12 



17 12 I 



15 



17 



17 



17 



8 



• 

 • i 



• • 



17 9 



17 9 



17 



9 



15 



17 15 



• • • g 



17 9 17 9 



17 10 



17 11 1 



1(5 



17 



17 



17 



13 



* 



1 • • 



17 16 









16 



17 15 



* * * « 



17 9 17 10 



• • • • 



17 11 1 



17 



17 



17 



17 



11 



♦ i 



► * 



17 16 



17 16 



17 



16 



17 17 15 I - • 



17 10 





18 



17 



17 



17 



10 



• 4 



► tf ■ 



17 9 



17 10 



17 



10 



18 17 15 ... . 



17 9 17 9 17 13 1 17 15 1 



19 



17 



16 



17 



8 



o 



/ 



17 4 



17 12 



17 



1 



16 



19 17 14 ... . 



17 7 17 7 17 10 17 10 I 



20 



17 



15 







17 



11 



17 9 



• * - - 



17 



11 



20 17 15 .... 



17 9 .... 17 13 17 15 1 



21 



17 



16 







17 



13 



17 13 



• • • • 



17 



15 



21 



17 18 



• • • • 



17 10 17 11 . . . . 17 15 1 



22 



17 



16 







17 



12 



17 12 



17 14 







22 



17 18 



« • • • 



17 10 17 11 1 



23 



17 



16 







17 



12 



17 13 



17 15 



17 



15 









1 f 





24 



17 



16 







17 



14 



17 10 



17 10 



17 



13 









[ [ 





25 



17 



16 







17 



11 



17 11 



17 11 



17 



14 















26 



17 



16 







17 



13 



17 12 



17 11 



17 



11 















27 



17 



14 







17 



11 



17 12 



17 14 



17 



15 

















28 



17 



16 







17 



12 



17 IS 



17 15 



17 



15 

















29 



17 



15 







17 



11 



17 12 



17 12 



L 



16 



_J 















* See the observations at the end. 



4 A 2 



