Secular Variation of the Magnetic Elements. 
IllOVO River— Latitude 30° 06'-l S. 
Longitude 30° 51'-0 E. 
Eepeat station. (See Eeport," Appendix, p. 89.) 
201 
Declination (D). 
Date. 
G.M.T. 
D (observed). 
Observer. 
Instrument. 
1913 July 2 
6.43 a.m. 
21° 24'-9 W. 
Beattie 
73 
7.36 a.m. 
21 27-3 
9.33 a.m. 
21 26-2 
11.31 a.m. 
21 24-9 
Dip (d). 
Date. 
G.M.T. Needle. 
6 (observed). 
Observer. 
Instrument. 
1913 July 2 
10.29 a.m. l,^^ 
62° 07'-4 S. 
Beattie 
9 
10.29 a.m. 5,,^ 
62 07-8 
10.30 a.m. 2,^3 
62 07-4 
10.31 a.m. 6,43 
62 08-1 
Horizontal 
Intensity (H). 
Date. 
G.M.T. 
H (observed). 
Observer. 
Instrument. 
1913 July 2 
7.51 a.m. V 
8.33 a.m. D 
H30 -17132 
Ueattie 
1 0 
9.09 a.m. V 
-17130 
Matj esfontein.— 
Latitude 33° 
14'-2 S. 
Longitude 20° 
36'-0 E. 
Eepeat station. (See " Eeport," Appendix, p. 
119.) 
Declination (D). 
Date. 
G.M.T. 
D (observed). 
Observer. 
Instrument. 
1913 June 22 
7.16 a.m. 
26° 50'-l W. 
Beattie 
73 
7.42 a.m. 
26 50-5 
9.42 a.m. 
26 51-5 
2.26 p.m. 
26 48-0 
>> 
2.40 p.m. 
26 48-7 
