— 20 — 
Tables 75 to 81 give the principal meteorological data for many 
places in the Nile valley and compare the Bombay rainfall with the 
Assuan gauges. The latter show how closely the Assuan gauge in 
flood follows the rainfall at Bombay. 
At Addis Ababa in the highlands of Abyssinia, the mean monthly 
temperature ranges between 19° and 15°, with a mean of 17°. The 
winds are south-east and east through the year. In 1902 the rainfall 
was 980 millimetres, and in 1903 it was 1340 millimetres. (Table 75). 
At Wad Medani in the Gezireh south of Khartoum, the mean monthly 
temperature ranges between 35° and 24°, with a mean of 30°. The 
winds from October to April are from the north and from May to 
September from the south. In 1902 there were 350 millimetres of 
rain and in 1903 there were 310. (Table 76). 
At Khartoum the mean monthly temperature ranges between 34° and 
19°, with a mean of 28°. The winds from October to April are from the 
north and from May to September from the south. In 1902 there 
were 120 millimetres of rain and in 1903 there were 70. (Table 77). 
For Alexandria, Cairo and Assuan, representing the Nile valley in 
Egypt, I have prepared the followng table 
ALEXANDRIA 
CAIRO 
ASSUAN 
Month 
THERMOMETER 
Centigrade. 
Rainfall. 
THERMOMETER 
Centigrade. 
Rainfall. 
THERMOMETER 
Centigrade. 
3 
S3 
Max. 
Min. 
Mean 
Max. 
Min. 
Mean 
Max. 
Min. 
Mean 
P3 
January 
25-0 
5-4 
24*1 
MILL. 
54 
26*6 
-0*7 
12*4 
MILL. 
6 
32*5 
4*0 
14*8 
MILL. 
February .. 
29*7 
6*2 
14*8 
22 
35*3 
1*2 
14-2 
3 
37*0 
5*0 
22*0 
. . 
March . . 
37*0 
5*5 
16*1 
17 
41-2 
3*2 
16-9 
5 
42*0 
8-0 
24*3 
. . 
April 
May 
38*9 
11*0 
18*5 
2 
42*6 
5-7 
20*9 
2 
46*6 
11*0 
27-3 
. . 
38*9 
13*3 
21*3 
13 
44*2 
9*0 
24*4 
2 
46*0 
17*0 
29*6 
. . 
June 
39*4 
13*8 
24-0 
# , 
45*2 
13*7 
27*3 
. . 
47*0 
20*0 
34-2 
. . 
July 
37*0 
20*5 
26*1 
44*3 
17-4 
28*5 
. . 
46*0 
23*0 
33*6 
. . 
August 
35*0 
20*3 
26*6 
41*6 
16*5 
27*7 
. . 
46-0 
21-0 
35*1 
. . 
September . . 
40*0 
18*7 
25-6 
• • 
40*6 
14*0 
25*3 
. . 
47*0 
17*0 
31*0 
. . 
October 
37*8 
15*0 
23*7 
9 
42*1 
12*1 
23*2 
1 
42*0 
18-0 
28*7 
. . 
November . . 
32-2 
10*8 
20*0 
38 
33*6 
3*5 
18*1 
6 
40*0 
11-0 
23*1 
. . 
December . . 
28*9 
6*8 
16*0 
80 
29-4 
1*3 
14-4 
6 
34*0 
6*0 
19*0 
• * 
Year.. 
40*0 
5*5 
20*6 
235 
45*2 
-0*7 
21*1 
31 
47*0 
4*0 
26*9 
0 
From the above table we may conclude that at Alexandria, Cairo 
and Assuan the absolute maximum thermometers may be taken 
