145 
attributed by some meteorologists to the influence of the 
wind. In order to test the soundness of this view, Mr. Bates r s 
observations were arranged in three groups ; the first group, 
comprising all the rainy days on which the movement of the 
wind did not exceed 200 miles ; the second, those on which 
it was greater than 200 miles, but did not exceed 800; and 
the third, those on which it exceeded 800 miles per day. The 
number of days in each group, the mean daily movement of 
the wind, and the amounts of rain received by the different 
gauges were as follows : — 
Group. 
Number 
of 
Days 
in 
Group. 
Mean 
Daily 
Move- 
ment 
of 
Wind. 
5 Inch Gauges, 
8 Inch Gauges. 
Elevation. 
Elevation. 
20ft. 
5ft. 
1ft. 
20ft. 
5ft. 
1ft. 
In. 
In. 
In. 
In. 
In. 
In. 
1 
61 
183 
8329 
8-635 
9-071 
8-517 
8-786 
9-007 
2 
59 
249 
12-713 
13-388 
14-171 
13-117 
13-875 
14-390 
3 
55 
385 
11-304 
11-893 
12-629 
11-526 
12-342 
12-660 
Representing by unity the quantity of rain received by 
•the lowest gauge in each set, we have the ratios given in the 
following table : — 
Group. 
Mean 
Daily 
Movement 
of 
Wind. 
5 Inch Gauges. 
8 Inch Gauges. 
Ratios c 
at 
20ft. 
>f quantities 
> Elevations 
5ft. 
i of Rain 
of 
1ft. 
Ratios c 
at 
20ft. 
>f quantities 
Elevations < 
5ft. 
of Rain 
Df 
1ft. 
1 
2 
3 
133 
249 
385 
In. 
0-918 
0-897 
0-895 
In. 
0-951 
9-944 
0-941 
In. 
1-000 
1-000 
1 - 000 ' 
In. 
0-945 
0-911 
0-910 
In. 
0-975 
0-964 
0-974 
In. 
1-000 
1-000 
1-000 
Comparing the results for group l with those for group 2, 
it would appear that an increase in the velocity of the wind 
from 133 to 249 miles per day, has a very sensible effect in 
diminishing the ratios for the higher gauges ; but on com- 
paring groups 2 and 3, it appears that the effect of a still 
further increase in the velocity of the wind from 249 to 385 
miles per day, is hardly appreciable. The differences between 
