Tlie Magnetic Elements at the Cape of Good Hope. 



I 3. Declination. 



The following list contains all the records of declination determi- 

 nation at the Cape of Good Hope which have come under onr 

 observation. 



Date. 

 1()05. 

 1(309. 

 1614. 

 1(314. 

 1622. 

 1675. 

 1675. 

 1691. 

 1721. 

 1754. 

 1751. 

 1753. 

 17(38. 

 1768. 

 1770. 

 1771. 

 1772. 

 1774. 

 1774. 

 1775. 

 1780. 

 1783. 

 1788. 

 1791. 

 1792. 

 1818. 

 1836. 

 1839. 

 1841. 

 1842. 

 1843. 

 1844. 

 1845. 

 1846. 

 1847. 

 1848. 

 1849. 

 1850. 

 1851. 

 1852. 

 Oct. 11, 1857. 

 1860. 

 1861. 

 1862. 

 18(33. 

 1864. 

 1865. 

 1866. 

 1867. 

 1868. 

 1869. 



Jan. 

 Kov. 



Jan. 



Jan . 

 Kov. 

 Dec. 



1873. 



Observers. 



Davis 



Keeling 



Pring 



Daunton 



Declination. 

 0^'30'E.ofN. 

 12 W. ofN. 

 30 



Authorities. 



Kemarks. 



Leydeker 



Mathews 



Mathews 



La Caille 



La Caille 



Wallis 



Carteret 



Ekeberg 



Cook 



Wales 



Ekeberg 



Bayley 



Wales 



Cook 



Lodberg 



Bligh 



Vancouver 



Dentrecasteaux . . 



Freycinet 



Fitzroy 



Du Petit-Thouar; 



E. A. Detachment . . 



E.A. 



K.A. 



R.A. 



R.A. 



E.A. 





 1 

 1 

 2 



8 



8 

 11 

 16 25 

 16 23 

 19 15 

 19 00 

 19 30 



45 

 

 



28 

 



19 

 19 



30 

 10 



20 30 



20 26 



21 39 

 21 36 



21 14 



22 16 

 22 

 24 

 25 



23 



4 

 40 

 24 31 

 26 31 



28 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 

 29 



30 

 9 



0-2 

 6-0 

 5-0 

 6-2 

 7-4 

 9-2 

 12-4 

 14-0 

 16-4 

 18-8 

 20-9 

 22 '9 

 34-4 

 29 41-8 

 29 44-8 

 29 50-3 

 29 52-1 

 53-9 

 01 



29 

 30 

 30 

 30 

 30 

 30 



20 

 1-7 

 1-9 

 1-5 



30 4-0 



1890. Preston 29 36-0 



1895. Finlay 29 18-0 



1897. Finlay 29 2-0 



1900. Beattie & Morrison 28 53-0 



Taken from Sabine's 

 ' Magnetical and 

 Meteorological Ob- 

 servations at the 

 Cape of Good Hope,' 

 vol. i. Magnetism. 



I E. Obs. C. of G. Hope 

 )' Maanetic Eecords. 



Eeise der ' Novara 



! Magnetic Eecords, E. 

 r Obs. C. of G. Hope. 



From April, 1841, to July, 1846, inclu- 

 sive the declination was observed 

 hourly. The declination given for 

 each year is the mean of all the ob- 

 servations for that year. 

 From Sept., 1846, to Aug., 1850, the 

 declination was observed five times 

 daily. The declination given for 

 the year is the mean of all the ob- 

 servations for that year. 



From Sept., 1850, to 

 Mar., 1852, the dech- 

 nation was observed 

 five times daily. 



From October, 1860, to 

 January, 1869, the 

 declination was ob- 

 served twice daily. 



J 



{ CJidllcufier Eeports, 

 '( Narrative, vol. ii. 

 ( U.S. Coast and Geodetic 

 ] Survey, Bull. 23. 



I Magnetic Eecords, E. 

 1 Obs. C. of G. Hope. 



