Proceedings of the British Association. 153 



Of the foreign European observatories, Brussels, (M. Q,uetelet:) 

 Prague, (HerrKreil:) and Milan, (Sig. Carlini :) have regularly 

 forwarded the term observations for each month to the Royal So- 

 ciety. The Cadiz observatory, (M. Montajo,) has been furnished 

 with all necessary instruments. 



Under the head of Observatories entirely new, your committee 

 have to announce the establishment of a private one at Havanah, 

 by Drs. Belot and Jorg. 



The term-days of May and August, 1840, have been both re- 

 markable for the magnitude of the disturbances. Mr. Riddeli 

 has undertaken to have all the observations of these two days 

 projected in curves, which will probably be soon com.pleted. 



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 cooperation, is fifty one. 



On the 12th of November, 1840, the Erebus and Terror 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 

 }X)int 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 Yan 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- 

 equate to the actual demands of magnetic science. 



Intimately connected with a system of simultaneous observa- 

 tions at central stations, is the subject of magnetic surveys of the 



Vol. xLii, No. 1.— Oct.-Dec. 1841. 20 



