630 



APPENDIX. 



[No. IV. 



TABLE IV. — The mean Diurnal Variation of the Compass for-four Months, were observed at Cumberland 

 House by Lieutenant Hood, R^N., lat. 53° 56' 40" N., long. 102° 16' 41" W. Dip S3 0 12' 50". 



Months. 



8 A.M. 



9 A.M. 



1 P.M. 



4 P.M. 



S P.M. 



12 P.M. 



1820 



O / II 



O 1 II 



O I li 



O / // 



O / // 





February 





17 16 0 E 



17 11 2 



17 9 9 



17 12 4 



17 13 0 



March 





17 14 9 



17 9 5 



17 9 7 



17 12 1 



17 13 4 



April 



17 15 7 E 





17 8 8 



17 9 6 



17 12 3 



17 13 9 



May 



17 16 9 





17 7 8 



17 8 3 





17 14 7 



TABLE V.— Monthly Abstract of Diurnal Variation, observed at Fort Enterprise. Lat. 64° 28' 24" N., 



Long-. 131° 6' 03" W. Dip. 86° 58' 42". 



1821 

 January 



February 



March 



April 



May 



Variation East 



At 10 A.M. 

 36 27 57 



9 A.M. 

 36 31 45 



8 A.M. 

 36 29 36 



7 A.M. 

 36 07 45 



7 A.M. 

 36 42 03 



Variation East 



o / // 

 JMoon 



36 22 09 

 36 21 57 

 36 17 21 

 36 06 03 

 36 29 45 



Variation East 



o / / 



2 P.M. 

 36 12 39 



36 17 27 



36 21 09 



Variation East 



o / // 

 3 P.M. 



36 12 03 

 36 15 51 

 36 10 45 

 36 02 51 

 36 21 09 



Variation East 



6 and 5 p.m. 



36 18 57 

 5 and 4 p.m. 



36 13 03 



4 P.M. 

 36 06 15 



5 P.M. 

 36 00 15 



36 14 57 



Variation East 



o / // 

 9 P.M. 



36 16 09 

 36 13 51 

 36 06 37 



35 55 15 



36 12 09 



Variation East 



Midnight 

 36 09 09 



36 11 57 



36 12 33 



35 40 03 



36 11 33 



Mean Variation observed with tbe Needle attached to the Transit Instrument, placed at a greater distance 



from the Buildings at Fort Enterprise. 



Between May 12 and 

 June 13, 1821 



8 and 9 a.m. 



37 25 5 E 



Noon 

 37 24 1 



4 and 5 P.M. 

 37 26 1 



9 and 10 P.M. 



O I li 



37 22 8 



Midnight 



O. / // 



37 23 OE 



TABLE VI. — Monthly Abstract of Diurnal Variation, observed at Moose-Deer Island, Slave Lake, 

 lat. 61° 11' 8" N., long. 113° 51' 37" W. 



1822 

 January . . . 

 February . . 

 March . . . 

 April .... 



Variation East 



Variation East 



Variation East 



Variation East 



VariationEast 



Variation East 



- O ' 'l 



from 7 A.M. 

 to 9 or 10 a.m. 



25 42 52 



25 40 10 

 25 40 52 

 25 42 16 



O / // 



Noon 

 25 42 23 

 25 38 56 

 25 39 06 

 25 40 23 



O 1 li 



3 P.M. 

 25 41 12 

 25 38 09 

 25 37 50 

 25 38 21 



Oil/ 



5 P.M. 



25 39 27 

 25 37 16 

 25 38 10 



O I il 



9 P.M. 

 25 40 42 

 25 39 07 

 25 37 47 

 25 38 49 



0 / // 



Midnight 



25 39 55 

 25 37 26 

 25 35 02 

 25 38 15 



Mean of the three complete 1 

 Months, Feb. March, and V 

 1 April S 



25 41 06 



25 39 28 



25 38 07 



25 38 18 



25 38 34 



25 37 14 



