309 



MAGNETIC OBSERVATIONS 



MADE DURING THE 



VOYAGE OF THE SCOTIA, 1902-1904. 



Contents. 



Pages 



Inti-oductoiy remarks. By Dr. C. Cheee, F.R.S 309 



Notes. By Mr. R. C. Mossman, F.R.S.E 309-311 



Discussion of the observations. By Dr. Chbee 312-318 



§ 1. Nature of observations 312 



§ 2. Declination. Absolute observations 312, 315 



§ 3. Inclination. Absolute obsei-vations 312, 316 



§ 4. Horizontal force. Absolute observations 312, 317 



§§ 5 and 6. Diurnal variation of declination 313,318 



§ 7. Fourier series 314 



§ 8. Comparison mtli Pawlowsk 314 



§ 9. Absolute declination for e])ocli January 1, 1904 314 



Introductory Remarks. 



An accoiuit of the site where the magnetic observations were taken, and various historical details, will be 

 found in the following notes by the observer, Mr. E. C. MossMAN, F.R.S.E. 



Accompanying the note is a Map of Laurie Island, showing the position of the magnetic hut 

 (Copeland Observatory), also two Plates, of which N"o. 1 shows the position of the hut in relation to the 

 central cairn and house; No. 2, fig. 1, showing the taking of preliminary observations on the site of the 

 future hut, and, fig. 2, plan showing the positions of the magnetic instruments inside the hut when in use. 



The instruments were compared wth the standard instruments at Kew before the expedition set sail, 

 and gave satisfactory results. 



C. C. 



NOTES ON THE MAGNETIC WORK OF THE EXPEDITION. 



BY 



R. C. MOSSMAN, F.R.S.E. 



The Scottish National Antarctic Expedition was equipped with the primary object of engaging in 

 Hydrographieal, Biological and Meteorological investigation in the Antarctic area known as the Weddell 

 Sea. The expedition was uot fitted out to prosecute magnetic work, but oceanographical research on the 

 lines of the " Challenger," " Valdivia " and other deep-sea expeditions, which work was to be carried on in 

 high southern latitudes within the limits of floating ice. The ship was in no way suited for the taking of 



