St. Helena. — Longitude 5° 40' West. Latitude 15° 56' South. Declination 23° 36' West. Inclination 21° 40' South. 
Mean Diurnal variation of the Declination for the years 1841 to 1845 inclusive. 
Increasing numbers denote increasing eastening of the north or upper end of the needle. Mean Declination 23° 36''6 West. 
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