TERRESTRIAL MAGNETISM. 83 



1845. Proceedings of the Magnetical and Meteorological 

 Conference held at Cambridge. 



1845. Observations made at the Magnetical and Me- 

 teorological Observatory at Bombay, under the superin- 

 tendence of A. B. Orlebar. The observatory was built in 

 1841, on the little island of Colaba. 



1845 1850. Six volumes of Eesults of the Magnetical 

 and Meteorological Observations made at the Eoyal Ob- 

 servatory at Greenwich. The magnetic observatory was 

 built in 1838. 



1845. Simonoff, Prof, at Kazan : Eecherches sur F Action 

 magnetique de la Terre. 



18461849. Captain Elliot (Madras Engineers) : Mag- 

 netic Survey of the Eastern Archipelago, sixteen stations, 

 several months being passed at each, in Borneo, Celebes, 

 Sumatra, the Nicobar, and the Keeling Islands, and 

 extending between N. latitude 16 and S. latitude 12, 

 longitudes 80 and 125 E. (Phil. Trans, for 1851, Part i. 

 p. 287 331, and p. 1. clvii.) There are appended maps 

 of the lines of equal inclination and declination, as well 

 as of the horizontal and total force. This work, which 

 also represents the positions of the magnetic equator, or 

 line of no inclination, and of the line of no declination, is 

 one of the most remarkable and comprehensive of modem 

 times. 



1845 1850. Faraday's brilliant physical discoveries : 

 1. On axial (paramagnetic) and equatorial (diamagnetic) 

 direction assumed by different bodies when freely sus- 

 pended and placed under external magnetic influences. ( 74 ) 

 (Phil. Trans, for 1846, 2420 ; and Phil. Trans, for 

 1851, 27182796); 2. On the relation of electro- 



G 2 



