Observations upon Magnetic Variations. 

 MAGNETIC VARIATIONS, &c— Continued. 



11: 



PLACE. 



Variation. 



Date. 



Observer. 



Ranffe 4-5, 

 «° 4-5; 

 " 4-5, 

 " 4-5, 

 " 4-5, 

 " 4-5, 

 " 4-5, 

 '< 4-5, 

 " 4-5, 

 " 4-5, 





1 20 W. 

 1 40 W. 



1 43 W. 

 3 13 W. 



2 00 W. 

 1 5 W. 



1 50 W. 



2 10 W. 

 1 40 W. 

 1 20 W. 



1798, 







" r 5. . .... 



u 



u 1 





5 .... 



(1 



6 ; ::. 



a 



' 6, 



it 





u 



8, 



u 



' 9, 



it 



' 10 



a 



' 11 



it 













River St. Lawrence. — In addition to the foregoing, from manuscript 

 records, I find upon the official survey of the River St. Lawrence, 

 from Lake Ontario to the Galop Rapid, by Captain W. F. W. Owen, 

 R. N., published in 1818 in five sheets, the following variations indi- 

 cated : 



Point Yeo, at the southwestern end of Wolf Island, or Grand 

 Island as called on some maps : var. 2° 30' W. 



Quebec Head, at the N. E. or lower extremity of the same island : 

 var. 2° 45' W. 



Barthrust Island, or Grenadier Island, upper end: var. 2° 50' W. 



Mouth of Chippewa Creek : var. 3° W. 



Point two Miles above Ogdensburgh : var. 3° 30' W. 



Upon the British official chart of Lake Ontario, by the same author, 

 in 1817, corrected to 1863, it is said, " variation in 1861 increasing 

 4' annually." 



[Sen. No. 81] 



15 



