_ Of the foreign European observatories, Brussels, (M. innit ' 
Prague, (Herr Kreil:) and Milan, (Sig. Carlini:) have regularly 
forwarded the term observations for each month to the Royal So~ 
on 
ciety. The Cadiz observatory, (M. sree has pees nee %, 
with all necessary instruments. 
~ Under the head of Cbiereitorieg entirely new, your commitige 
have to announce the establishment of a private one snot 
by Drs. Belot and Jorg. 
The term-days of May and August, 1840, have isean jalan 
markable for the magnitude of the disturbances. Mr. Riddell 
has undertaken to have all the observations of these two days 
projected in curves, which will probably be soon completed. 
_M. Kupffer reports that the observations in the magnetic ob- 
servatory at St. Petersburgh commenced Jan. 1, and at Caterine- 
burgh, March 10. In the course of the summer, they will be 
commenced at Helsingfors; and at Tiflis, in all probability, du- 
ring the autumn. The total number of magnetical observatories 
which may be at present reckoned on as brought, or about to be 
brought, into effective coéperation, is fifty one. — 
- On the 12th of November, 1840, the Brebus and Teves left 
Hobart Town for their first summer’s research in the Antarctic 
Circle, leaving Lieut. Kay with Messrs. Dayman and Scott as 
his assistants, in charge of the observatory at Ross Bank. On 
board, and during temporary sojourns of the expedition on land 
or ice, the observations will be made on the same enlarged plan 
as at Hobart Town. The first term will, in all probability, have 
been observed in November at the Auckland Islands. The first 
point to be determined would be, the point of maximum inten- 
sity in the southern hemisphere, the meridian of which had been 
indicated by the daily observations in the passage from Kergue- 
len’s Land to Van Diemen’s Land, leaving only its latitude un- 
decided. Having accomplished this, they will proceed, as rap- 
idly as circumstances will permit, to seek and determine the po- 
sition of the point of vertical dip. The observations at sea, it 
should be mentioned, succeed to the fullest extent of the most 
Sanguine expectations; so much so, that the three magnetic ele- 
ments are daily observed on board, with a precision perfectly ad- 
—— to the actual demands of magnetic science. 
~ Intimately connected with a system of simultaneous chesiadee 
tions at central stations, is the a of magnetic surveys of the 
Vol. xu, No. 1.—Oct.-Dec. 1841. 
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