306 
Transactions of the Royal Society of South Africa. 
TABLE 1. 
Hourly Variation in Millimetres of the Horizontal 
Midn't. 

I. 
II. 
III. 
1 
IV. 
V. 
VI. 
VII. 
VIII. 
IX. 
X. 
XI. 
1903 


May 
I'O w 
1*0 W 
1*3 W 
I'o W 
1 .O TTT 
1"8 vV 
T A TTT 
1-9 VV 
A.I TTT 
2'1 VV 
A if TTT 
2'5 W 
A . Cr TTT 
2 "5 W 
a . A TTT 
2'4 W 
1 /? TTT 
I'D W 
A.O TTT 
O'd VV 
June 
12 
1'3 
1*6 
1 A 
1-9 
A 1 
2*1 
A . O 
2 3 
A .£* 
2'b 
2'b 
A . cr 
2 '5 
A . O 
2'd 
1 ./^ TTT 
lb W 
A.O TTT 
0'3 VV' 
July 
I'D 
1*8 
2"1 
A .O 
2 "3 
2o 
A - C 
2o 
2'b 
A *n 
2'7 
2 '7 
A . C 
2*5 
17 W 
f\ , A TTT 
0'4 W 
Aug. 
19 
2'2 
A A 
2-4 
2o 
2*7 
A . O 
2 '8 
A .O 
2 '8 
2'b 
A .O 
2 2 
A .A 
2*0 
13 W 
A .A 
O'O 
bept. 
19 
2*2 
2*4 
2 '5 
A .r? 
2-7 
2*7 
A .1 
2 1 
lb 
n*n TTT 
0'7 W 
0 7 hi 
uct. 
1'9 
2-0 
A .1 
2*1 
2 1 
A .A 
2 '2 
A .A 
2 2 
2*1 
1 .A 
19 
15 
11 
A .O TTT 
0 3 W 
A .r? Til 
0 7 hi 
Nov. 
2 0 
2-b 
A . f* 
2-b 
2*b 
A . Cf 
2*5 
2 4 
A.I 
2*1 
18 
1 4 
A .17 
0'7 
A.I TP 
0 1 ht 
12 sLi 
L>ec. 
10 
I'd 
1 '4 
1*3 
1*4 
1 o 
I'd 
12 
A .A 
0 9 
A . C 
0'5 
A .O T71 
O'O iLi 
A .A Til 
0 9 ill 
1 C\C\A 
J an. 
U O 
A.Q 
u y 
1 .1 
1 .o 
i z 
1 ./( 
1 4 
1 D 
1 o 
i ± 
A .Q 
A .O WT 
U 4 Hi 
-beb. 
O'O 
0-2 
0'4 
0-5 
0-7 
0-9 
11 
1'2 
I'l 
0*7 
A . "I TTT 
O'l w 
0'5 E 
Mar. 
0*9 
1 A 
I'O 
1-2 
1*3 
1*5 
1'7 
1 . A 
1'8 
19 
18 
1*5 
A . O TTT 
0 8 W 
A .A Tjy 
0*2 E 
April 
0*8 
1"0 
1 6 
1 4 
17 
A . T 
2'1 
A .1 
21 
A .A 
2 '2 
A .A 
2'0 
17 
1 .A TTT 
I'O W 
A.O 
0'2 E 
May 
0-8 
11 
1-4 
1-7 
1-7 
1-8 
2'0 
2 1 
2'1 
2-0 
1'3 W 
0'2 W 
June 
0-7 
1-1 
1-4 
1-6 
1-8 
2-0 
2 '2 
2'4 
2'2 
1-9 
1-5 W 
0'5 W 
July 
1-0 
1-3 
1-6 
2-0 
2-2 
2-3 
2 '4 
2-7 
2'6 
2-3 
1'7 W 
0'6 W 
Aug. 
1-5 
1-8 
2-1 
2-3 
2-5 
2-6 
2 '6 
2 '5 
2 '4 
2-1 
1'2 W 
0-2 E 
Sept. 
1-4 
1-7 
2-1 
2-4 
2-5 
2-5 
2 '5 
2 '4 
21 
1-9 
0'8 W 
0'3 E 
Oct. 
1-5 
1-9 
2-2 
2-4 
2-5 
2-5 
2-3 
2'0 
1'5 
1-0 
0'4 W 
0-6 E 
Nov. 
2-0 
2-3 
2-5 
2-7 
2-8 
2-7 
2 '3 
1'9 
1'5 
0'7 
O'l E 
I'l E 
Dec. 
1-5 
1-9 
2-1 
2-3 
2-3 
2-1 
1'9 
1-7 
1'6 
1-0 
0'3 W 
0'5 E 
1905 
Jan. 
0-9 
1-3 
1-6 
1-6 
1-6 
1-5 
1'4 
1'5 
1'5 
1-2 
0-5 W 
0-3 E 
Feb. 
1-6 
1-8 
2-1 
2-1 
2-0 
2 0 
2'0 
1'8 
1'6 
I'O 
0'3 W 
0-3 E 
Mar. 
1-4 
1-6 
1-9 
1-9 
2-2 
2-3 
2-4 
2'3 
1-8 
1-7 
0-8 W 
O'l E 
April 
1-2 
1-5 
1-8 
2-1 
2-3 
2-5 
2 '8 
2 '6 
2-0 
1-7 
I'O W 
O'O 
May 
1-4 
1-6 
1-8 
1-9 
2-1 
2-3 
2 '5 
2-5 
2-3 
1-9 
1-1 W 
O'l W 
June 
1*3 
1-7 
1-9 
2-3 
2-6 
2-8 
2-8 
2 '9 
2-8 
2-5 
1'9 W 
0-5 W 
July 
1-7 
21 
2-3 
2-4 
2-5 
2-8 
31 
3'2 
3'1 
2'8 
1'9 W 
0-2 W 
Aug. 
2-0 
2-3 
2-6 
2-8 
3-0 
3-1 
3 '3 
3 '4 
31 
2-3 
1-5 W 
0 0 
Nov. 
1-4 
1-7 
1-9 
2-1 
2-1 
21 
1'7 
1'6 
1-2 
0-5 
0'2 E 
0'7 E 
Dec. 
1-3 
1-5 
1-7 
1-7 
1-7 
1-7 
1'7 
1'6 
1-4 
1-0 
0-4 W 
O'l E 
1906 
Jan. 
1-3 
1-3 
1-4 
1-4 
1-5 
1-4 
1'5 
1-5 
1-2 
1-0 
0'6 W 
O'l W 
Feb. 
1-0 
1-2 
1-6 
1-8 
2-0 
2-1 
2 '2 
2-2 
1'9 
1-3 
0'6 W 
O'l E 
Mean 
1-3 W 
1-6 W 
1-8 W 
20 W 
2-1 W 
2-2 W 
2-2 W 
2-1 W 
1-9 W 
1-5 W 
0-8 W 
0-2 E 
