142 Scientific Intelligence. 
The mean declination of the magnetic needle at Munich— 
For 1841, was : ‘ ‘ ‘ . 544 
842, “ : . : ‘ ; 16° 48-0 
Annual decrease of west declination, F £ 
(6.) Proceedings connected with the Magnetical and Meteorological 
Conference held at Cambridge, (Eng.) in June, 1845. 
From this pamphlet we learn that the British government have re- 
solved to equip a new Arctic expedition under the command of Sir 
Joun Franxuin, with a view to the completion of the discovery of a 
northwest passage. The expedition, consisting of the Erebus and the 
Terror, furnished with steam-power, and provided with all the instru- 
ments necessary for the prosecution of magnetic and meteorological 
observations, sailed during the summer of 1845. 
new magnetic observatory has recently been established in British 
Guiana; and an observatory is in contemplation at Colombo, in Ceylon. 
Lieut. Lergo¥ has completed his magnetic survey of an important 
part of North America. He has determined the three magnetic ele- 
ments at above 100 stations within the isodynamic oval of 1°7. 
Lieuts. Moore and Cuerx sailed in the Pagoda, Jan. 9th, 1845, 
from Simon’s Bay, on the magnetic survey of that part of the At- 
lantic Ocean left unexplored by Sir James Ross. She crossed the 
Antarctic circle on the 5th of February, in long. 30° 45’ E., and her 
furthermost point south was 67° 50. She returned to the Cape, via 
St. George’s Sound, Australia, on the 20th of June last, having sailed 
over more degrees of longitude within the sixtieth parallel than any 
other single vessel. As the second term of three years, during which 
the magnetic and meteorological establishments of the British and other 
goyernments were to be continued, would expire with the year 1845, 
the magnetic committee of the British Association, about a year since, 
entered into an extensive correspondence with foreign meteorologists on 
the subject of a continuance of the observations. Several distinct ques- 
tions were proposed, upon which opinions were requested. Replies 
were received from a large number of individuals, generally expressing 
the desire that the observations might be continued, with some modifi- 
cations. ‘The most eminent persons in these sciences from all parts of 
the world, were invited to a conference on the subject, which was held 
at Cambridge in June last. Among others, there were present at the 
conference, Messrs. Kurrrer, Krett, Erman, Dove, Bocus.awskt and 
“Levrrenserc. The result of this conference was the adoption of res- 
ut ions recommending the continuance of observations upon substan- 
tially the present system, for another period of three years. It is to be 
hoped that this recommendation will be generally concurred in, and that 
codperation during the coming three years will be more general and 
astic than ever. ; 
