of the Magnetic Poles of the Earth. 123 
From these observations it would appear.that the declina- 
tion in Fort Prince of Wales in the year 1795, was =0; that 
therefore the magnetic converging point lay north of it, viz. in 
the meridian 265° 48’. We have seen above that in the year 
1769 it lay in 209° 58’; and consequently that from 1769 till 
1795, z.e. in the space of 26 years, this point moved 5° 50! from 
west to east, by which the annual variation would amount to 
1345. The following observations made in Hudson’s Bay 
in1813, and which are also extracted from the above-quoted 
log-book, will determine the point more exactly. 
Long. W. from 
: Declination. 
Greenwich, 
1813. | North Lat. 
° U ° i 
j Aug. 1] 6216 | 70 17 
OW. 
TE}. 62 A7 80 17 c@) 
Sept. 3] 58 48 94 16 60E. 
23| 58 18 88 50 10 0 W. 
60 35 81 30 36 0 W. 
Calculating these observations by pairs, in the usual man- 
ner, we find the following situation of the American point of 
convergence : 
According to some older observations by Chr. Middleton, 
I have Jaid down the situation of this point for the year 1730, 
in my work on the magnetism of the earth, (p. 90, 91,) as fol- 
lows. Distance from the pole = 19° 43’, and eastern longitude 
sloop Brazen’s Remark-book between the 31st of June and 24th of Novem- 
ber 1813, in Hudson’s Bay; which I read in the year 1819, together with 
a great many other ship-journals and log-books in the Marine Chart Office 
of the Admiralty in London.—H, 
Q 2 from 
