OF THE WIND AND BAEOMETEIC PEESSUEE AT BOMBAY. 
15 
Table VI. — Mean North or South and East or West components of the Wind at Fal- 
mouth for fifty days between the 1st April and 2nd September, 1869, for each hour 
of the day, also their mean diurnal variations for the same period. 
Falmoutli Civil Hours 
Oto ]. 
1-2. 
2-3. 
3-4. 
4-5. 
5-6. 
6-7. 
7-8. 
ST. or S. component 
2-9 n. 
3 - 5 n. 
3 8 n. 
3-5 n. 
4'1 N. 
3-5 n. 
31 N. 
5-8 n. 
Variation 
2-6 w. 
3-2 n. 
3 5 n. 
32 n. 
3-8 n. 
3 2 n. 
2-8 n. 
2-5 n. 
E. or W. component 
2 0 w. 
1-9 w. 
1-7 w. 
1-3 w. 
1-4 w. 
0 5 w. 
0-8 w. 
1-2 E. 
Variation 
I S w. 
1-7 w. 
1-5 w. 
. 11 w. 
1-2 w. 
0 3 w. 
0-6 w. 
1-4 E. 
Falmouth Civil Hours 
S-9. 
9-10. 
10-11. 
11-12. 
12-13. 
13-14. 
14-15. 
15-16. 
H. or S. component 
1-8 N. 
0 2 s. 
21 s. 
3 3 s. 
4'4 s. 
4-4 s. 
3-9 s. 
2-8 s. 
Variation 
1'5 N. 
0 5 s. 
2-4 s. 
3 6 s. 
4-7 s. 
47 s. 
4-2 s. 
31 s. 
E. or W. component 
2-2 e. 
31 e. 
4-0 e. 
2-8 e. 
16 E. 
1 -2 E. 
0-2 w. 
00 
Variation 
2-4 e. 
3-3 e. 
42 e. 
3-0 e. 
1-8 E. 
1-4 E. 
0-0 
0-2 e. 
Falmouth Civil Hours 
16-17. 
17-18. 
18-19. 
19-20. 
20-21. 
1-22. 
22-23. 
23-0. 
N. or S. component 
2-2 s. 
0-8 s. 
0-3 n. 
1-9 N. 
2-2 n. 
1-7 N. 
2-2 n. 
2 5 n. 
Variation 
2-5 s. 
11 s. 
00 
1-6 N. 
1-9 N. 
1-4 N. 
1-9 N. 
2-2 n. 
E. or W. component 
12 w. 
2 0 w. 
1-8 w. 
2 0 w. 
16 w. 
2-2 w. 
21 w. 
20 w. 
Variation 
1 0 w. 
1 '8 w. 
l'O w. 
1-8 w. 
1-4 v,’.] 
2 0 w. 
1-9 w. 
1-8 w. 
The mean components for the whole period are (ho N. and 02 W. 
Considering the small number of observations from which it is deduced, the curve is 
a remarkably regular one, and accords in many respects with the typical curve, fig. 9. 
The rotation is right-handed ; the morning hours occupy the east side of the curve, the 
hours about midday are to the south, and the afternoon hours to the west, while the 
midnight hours are crowded together towards the north-west, but there are no definite 
indications of a double diurnal rotation. This figure will probably interest many mag- 
neticians ; for when it is turned in a right-handed direction through an angle of about 90° 
in the plane of the paper, it bears a very striking resemblance to a curve which repre- 
sents the mean diurnal variation of the earth’s magnetic force in a horizontal plane at 
Greenwich; and which is published in the Greenwich Observations for 1867. 
18. The Toronto observations of the wind also show a diurnal variation which rotates 
in a right-handed direction. The following results (see Table VII., p. 16) are deduced 
from the “ Meteorological Abstracts, Toronto 1854-1859,” Tables LII. and Fill. 
Fig. 13 is a graphic representation of this variation, from which it will be seen that 
the diurnal variation of the wind at Toronto has similar features to those of the Falmouth 
curve, and that it resembles the typical curve (fig. 9) in the same particulars. There is 
an absence of any distinct indication of a double diurnal rotation in this case also. 
