145 
attributed by some meteorologists to the influence of the 
wind. In order to test the soundness of this view, Mr. Bates'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 300; and 
the third, those on which it exceeded 300 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 j 
Daily 
More- | 
ment 
of 
Wind. 
5 Inch Gauges, 
i 
8 Inch Gauges. 
Elevation. 
Elevation. 
20ft. 
Eft. 
ift. ; 
20ft. 
5ft. 
lft. 
In. 
In. 
In. 
In. . 
In. 
In. 
1 
61 
133 
8-329 
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 : — 
Mean 
Daily 
Movement 
of 
Wind. 
5 Inch Gauges. 
8 Inch Gauges. 
Group. 
Ratios of quantities of Bain 
at Elevations of 
Ratios of quantities of Rain 
at Elevations of 
20ft. 
5ft. 
lft. 
20ft. 
Eft. 
lft. 
1 
133 
In. 
0-918 
In. 
0-951 
In. 
1-000 
In. 
0-945 
In. 
0-975 
In. 
1-000 
2 
249 
0-897 
9-944 
1-000 
0-911 
0-964 
1-000 
3 
385 
0-895 
0-941 
1-000 
0-910 
0-974 
1-000 
Comparing the results for group 1 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 
