an Improved Pluviameter . 
331 
registered, will exhibit the nearest approximation to a correct 
estimate that has yet been obtained of one of the most interest¬ 
ing phenomena in meteorology. 
HORIZONTAL V LUVIAMETEIt. 
1 
2 
3 
4 
1 
5 
6 
7 
1 
8 
9 
10 
1 
71 
89 
95 
97 
98 
98* 
99 
99 
99* 
99* 
2 
45 
71 
83 
89 
93 
95 
96 
97 
97 * 
98 
3 
31 
56 
71 
80 
85 
39 
92 
94 
95 
96 
4 
24 
45 
60 
71 
78 
83 
87 
89 
91 
93 
5 
20 
37 
52 
63 
71 
77 
81 
85 
87 
89 
i 
6 
17 
32 
45 
56 
64 
71 
76 
80 
83 
85 
7 
14 
28 
39 
50 
58 
66 
71 
75 
79 
82 
8 
12 
24 
35 
45 
53 
60 
66 
71 
75 
78 
9 
11 
22 
32 
41 
49 
56 
62 
66 
71 
74 
10 
10 
21 
29 
37 
44 
51 
57 
63 
67 
71 
The above table indicates the correction for the draft of the 
rain ; taking the pluviameter to contain one hundred square 
inches area, or the proportional parts to one hundred, if of any 
other number. 
The indices can represent either inches, tenths, or hundredths, 
as the case may require. 
With the quantity found in the horizontal, and in the column 
opposite that found in the perpendicular rain-guage, take out 
the number corresponding thereto, which will be to 100, as the 
quantity found in the horizontal pluviameter will be to the true 
quantity fallen; provided the area be one hundred inches, or its 
proportion if it be of any other size. 
