Secular Variation of the Magfietic Elements. 
191 
Kenhardt. (2, 4) 
Date. Declination. Dip. Horizontal Intensity. 
1913'-01 25° 07'-l W. 59° 21'-8 S. -18039 
1904-96 26 15-4 58 13-2 -18808 
Secular Variation. 
1913-01-1904-96 = 8-05 yrs. -8'-5 -8'-5 -96y 
Klerksdorp. (2, 4) 
Date. Declination. Dip. Horizontal Intensity. 
1911-02 22° 16'-3 W. 59° 03'-3 S. -18520 
1903-47 23 42-0 58 12-0 -19124 
Secular Variation. 
1911-02-1903-47 = 7-55 yrs. -ll'-3 +6'-8 -80y 
St. Paul de Loanda. (9) 
Date. 
Declination. 
Dip. 
Horizontal Intensity. 
1910 
16° 12'-3 W. 
35° 32'-2 S. 
•20125\ 
1908 
16 20-4 
35 21-7 
•20181 
1 
1907 
16 25-9 
35 22-0 
-20205 ! 
1906 
16 30-0 
35 15-9 
•20196 i 
^T.M., vol. xvi., 
P- 
214 
1905 
16 35-4 
35 12-0 
•201821 
1 
1904 
16 45-5 
35 07-0 
•20242/' 
1902 
16 59-9 
34 52-9 
-20297 
T.M., vol. xii., 
p. 
181 
1899 
17 03-0 
Secular Variation. 
Date. Declination. Dip. Horizontal Intensity. 
1910-1905 = 5 yrs. -4'-6 +5'-0 -13y 
1905-1899 = 6 yrs. -4-6 
I' From Magnetic Observa- 
1899-1888 = 11 yrs. - 6-0 1 tions in Northern Africa. 
1888-1881 = 7 yrs. -5-0 ] By B. F. E. Keeling 
I (p. 22) 
Lorenco Marques. (5, 8) 
Date. Declination. Dip. Horizontal Intensity. 
1906-53 21° 41'-1 W. 59° 27'-6 S. -19302 
1899-01 23 11-4 58 54-1 -19782 
