Cape of Good Hope. — Longitude 18° 30' East. Latitude 33° 5G' South. Declination 29° 05' West. Inclination 53° 15' South. 
Mean Diurnal variation of the Declination in each month of tlie years 1841 to 1846. 
Increasing numbers denote a movement of the north or upper end of the magnet towards the East. 
±* 2 
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Mean time ... 
January 
February 
March 
April 
May 
June 
July 
August 
September ... 
October 
November ... 
December . . . 
117 
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