PHILOSOPHICAL TRANSACTIONS. 
VII. Contributions to Terrestrial Magnetism. — A T o. VI. 
By Lieut -Colonel Edward Sabine, R.A., F.R.S. 
Received April 17, — Read April 18, 1844. 
§ 10. Observations made on Board Her Majesty's Ships Erebus and Terror , from 
June 1841 to August 1842, in the Antarctic Expedition under the command of 
Captain Sir James Clark Ross, R.N., F.R.S. 
I HAVE now to lay before the Royal Society the results of the Magnetic Observa- 
tions made at sea by the Antarctic Expedition daring the second year of its opera- 
tions in the southern hemisphere. Leaving Hobarton early in July 1841, the ships 
proceeded in the first instance to Sydney in Australia, and from thence to the Bay 
of Islands in New Zealand, where they remained until the return of the season of 
navigation in the high latitudes. Quitting New Zealand in November, the ice was 
met with and entered in a somewhat lower latitude than in the preceding year, and 
in a longitude considerably to the east of the former track. The obstacles which the 
ice presented to their progress appear to have been greater than on the former 
occasion; they were however surmounted, and in February 1842 the ships again 
reached the ice barrier, or glacier, in latitude 78°, by which they had been stopped 
in the preceding year. After an unsuccessful endeavour to turn the eastern extre- 
mity of the glacier, the advance of the season compelled their return to the lower 
latitudes; they quitted the Antarctic Circle in March 1842, and keeping nearly in 
the 60th parallel, crossed the whole breadth of the southern Pacific Ocean to the 
Falkland Islands, where they arrived in April. 
I proceed at once to the examination in detail of the magnetic observations made 
during this period. 
MDCCCXLIV. 
N 
