TERRESTRIAL MAGNETISM, 79 



2. Observations made at the magnetical observatory at 

 Toronto (N. lat. 43 39' ; W. long. 79 21'-5), Yol. i. 1840, 

 1841, and 1842; and Yol. ii. 1843, 1844, and 1845- 



3. The very different march of the magnetic declination in 

 the two half-years at St. Helena $. lat. 15 55', W. long. 

 5 41') : Phil. Trans, for 1847, Pt. i. p. 54. 4. Observa- 

 tions made at the magnetical and meteorological observatory 

 at the Cape of Good Hope, 1841 1846: Yol. i. Magnetism. 



5. Observations made at the magnetical and meteorological 

 observatory at Hobarton (8. lat. 42 52', E. long. 147 27''5) 

 in Yan Diemen Island, and on the Antarctic Expedition, 

 Yols. i., ii., and hi., 1841 1852 (on the separation of the 

 eastern and western disturbances, see Yol. ii. p. ix. xxxvi.) 



6. Magnetic phenomena in the Antarctic circle, and in Ker- 

 guelen and Yan Diemen Islands : Phil. Trans, for 1843, 

 Pt. ii. p. 145 231. 7. On the Isoclinal and Isodynamic 

 Lines in the Atlantic Ocean in 1837 : Phil. Trans. 1840, 

 Pt. i. p. 129 155. 8. Declination Map of the Atlantic 

 Ocean, representing the lines of magnetic declination 

 between 60 N. and 60 S. latitude for 1840 : Phil. Trans. 

 1849, Pt. ii. p. 173233. 9. On the means adopted at 

 the British Colonial observatories for determining the abso- 

 lute values, secular change, and annual variation of the 

 magnetic force : Phil. Trans. 1850, Pt. i. p. 201219. 

 (Coincidence shown of the epoch of the Earth's greatest proxi- 

 mity to the Sun, with the greatest intensity of the terrestrial 

 magnetic force in both hemispheres, and with the greatest 

 amount of inclination, p. 216.) 10. On the isoclinal and 

 isodynamic lines in the northern parts of the North Ame- 

 rican continent, and on the geographical position of the 

 point of maximum force, deduced from the observations of 



