170 Prof. Hansteen on the Number and Situation 
II. Observations made by Captain Parry. 
North Lat, Long. W. from 
‘| Greenwich. 
September 6 
11 
1820. July 18 
September17 
28 
From these observations it would appear, that the greatest 
dip was found by-Captain Ross on the 20th of August 1818, 
near the entrance of Sir James Lancaster’s Sound, into which 
he did not venture to penetrate; but that Captain Parry, after 
having proceeded up that sound, found a regular increase of 
the dip, till on the 11th of September 1819 it had risen to 
88° 37’, leaving the needle only 1° 23! from the vertical posi- 
tion. We may then conclude from this increase cf the dip, 
that the expedition was about 3° north of the point where the 
dip is 90°, which also agrees pretty nearly with the point of 
convergence which we have deduced before from the observed 
declinations. Thus then, according to the indication of both 
instruments a magnetic pole exists in that vicinity. 
If we consider the southern segment of the globe (Plate IT.), 
we see that between the meridians 50° and 140° all the ar- 
rows are directed to one point, which is about 20° distant 
from the antarctic pole, and 137° east of Greenwich. ‘To the 
east of the meridian of 140°, and to the west of that of 40°, the 
arrows begin to deviate from this point; and in the vicinity of 
Terra del Fuego, between 240° and 300° of longitude, they 
are again directed to another point, distant about 32° from 
the pole, and situated in 237° longitude. Thus the southern 
hemisphere has, like the northern, two different points of 
* Regent’s Park, London. + Possession Bay. 
} East coast of Regent’s Island. § North side of Barrow’s Strait. 
|| Byam Martin’s Island. { Melville Island. 
** Observatory in Winter Harbour. +f Near London. . 
magnetic 
