Table I.—Temperature of the Dew-Point, in Degrees Fahrenheit.
| t |
Difference between the dry and wet thermometers (t-t′). |
t |
| (Dry ther.) |
2°.6 |
2°.8 |
3°.0 |
3°.2 |
3°.4 |
3°.6 |
3°.8 |
4°.0 |
4°.2 |
4°.4 |
(Dry ther.) |
| -2 |
-48 |
|
|
|
|
|
|
|
|
|
-2 |
| -1 |
-39 |
-54 |
|
|
|
|
|
|
|
|
-1 |
| 0 |
-33 |
-43 |
|
|
|
|
|
|
|
|
0 |
| +1 |
-28 |
-35 |
-46 |
|
|
|
|
|
|
|
+1 |
| 2 |
-25 |
-30 |
-37 |
-50 |
|
|
|
|
|
|
2 |
| 3 |
-21 |
-26 |
-31 |
-39 |
-54 |
|
|
|
|
|
3 |
| 4 |
-19 |
-22 |
-27 |
-32 |
-42 |
-60 |
|
|
|
|
4 |
| 5 |
-16 |
-19 |
-23 |
-28 |
-34 |
-45 |
|
|
|
|
5 |
| 6 |
-14 |
-17 |
-20 |
-24 |
-29 |
-35 |
-47 |
|
|
|
6 |
| 7 |
-12 |
-14 |
-17 |
-20 |
-24 |
-29 |
-37 |
-50 |
|
|
7 |
| 8 |
-10 |
-12 |
-15 |
-17 |
-21 |
-25 |
-30 |
-38 |
-53 |
|
8 |
| 9 |
-8 |
-10 |
-12 |
-15 |
-18 |
-21 |
-25 |
-31 |
-39 |
-55 |
9 |
| 10 |
-6 |
-8 |
-10 |
-12 |
-15 |
-18 |
-21 |
-26 |
-31 |
-40 |
10 |
| 11 |
-4 |
-6 |
-8 |
-10 |
-12 |
-15 |
-18 |
-21 |
-26 |
-31 |
11 |
| 12 |
-2 |
-4 |
-6 |
-8 |
-10 |
-12 |
-15 |
-18 |
-21 |
-26 |
12 |
| 13 |
-1 |
-2 |
-4 |
-5 |
-7 |
-9 |
-12 |
-14 |
-17 |
-21 |
13 |
| 14 |
+1 |
0 |
-2 |
-3 |
-5 |
-7 |
-9 |
-11 |
-14 |
-17 |
14 |
| 15 |
3 |
+1 |
0 |
-2 |
-3 |
-5 |
-7 |
-9 |
-11 |
-14 |
15 |
| 16 |
4 |
3 |
+2 |
0 |
-1 |
-3 |
-4 |
-6 |
-8 |
-10 |
16 |
| 17 |
6 |
5 |
3 |
+2 |
+1 |
-1 |
-2 |
-4 |
-6 |
-8 |
17 |
| 18 |
7 |
6 |
5 |
4 |
2 |
+1 |
0 |
-2 |
-3 |
-5 |
18 |
| 19 |
9 |
8 |
7 |
5 |
4 |
3 |
+1 |
0 |
-1 |
-3 |
19 |
| 20 |
10 |
9 |
8 |
7 |
6 |
5 |
3 |
+2 |
+1 |
-1 |
20 |
| t. |
2°.6 |
2°.8 |
3°.0 |
3°.2 |
3°.4 |
3°.6 |
3°.8 |
4°.0 |
4°.2 |
4°.4 |
t. |
| |
|
|
|
|
|
|
|
|
|
|
|
| t. |
4°.6 |
4°.8 |
5°.0 |
5°.2 |
5°.4 |
5°.6 |
5°.8 |
6°.0 |
6°.2 |
6°.4 |
t. |
| 8 |
|
|
|
|
|
|
|
|
|
|
8 |
| 9 |
|
|
|
|
|
|
|
|
|
|
9 |
| 10 |
-57 |
|
|
|
|
|
|
|
|
|
10 |
| 11 |
-41 |
-60 |
|
|
|
|
|
|
|
|
11 |
| 12 |
-31 |
-41 |
-59 |
|
|
|
|
|
|
|
12 |
| 13 |
-25 |
-31 |
-40 |
-58 |
|
|
|
|
|
|
13 |
| 14 |
-20 |
-25 |
-30 |
-39 |
-56 |
|
|
|
|
|
14 |
| 15 |
-16 |
-20 |
-24 |
-30 |
-38 |
-53 |
|
|
|
|
15 |
| 16 |
-13 |
-16 |
-19 |
-23 |
-28 |
-36 |
-50 |
|
|
|
16 |
| 17 |
-10 |
-12 |
-15 |
-18 |
-22 |
-27 |
-34 |
-47 |
|
|
17 |
| 18 |
-7 |
-9 |
-12 |
-14 |
-17 |
-21 |
-26 |
-32 |
-44 |
|
18 |
| 19 |
-5 |
-7 |
-9 |
-11 |
-14 |
-17 |
-20 |
-25 |
-30 |
-40 |
19 |
| 20 |
-2 |
-4 |
-6 |
-8 |
-10 |
-13 |
-16 |
-19 |
-23 |
-29 |
20 |
| t. |
4°.6 |
4°.8 |
5°.0 |
5°.2 |
5°.4 |
5°.6 |
5°.8 |
6°.0 |
6°.2 |
6°.4 |
t. |
Table I.—Temperature of the Dew-Point, in Degrees Fahrenheit.
| t |
Difference between the dry and wet thermometers (t-t′). |
t |
| (Dry ther.) |
0°.5 |
1°.0 |
1°.5 |
2°.0 |
2°.5 |
3°.0 |
3°.5 |
4°.0 |
4°.5 |
5°.0 |
5°.5 |
6°.0 |
(Dry ther.) |
| 20 |
18 |
17 |
15 |
13 |
10 |
8 |
5 |
2 |
-2 |
-6 |
-12 |
-19 |
20 |
| 21 |
19 |
18 |
16 |
14 |
12 |
9 |
7 |
4 |
0 |
-4 |
-8 |
-15 |
21 |
| 22 |
20 |
19 |
17 |
15 |
13 |
11 |
8 |
6 |
+2 |
-1 |
-6 |
-11 |
22 |
| 23 |
22 |
20 |
18 |
16 |
14 |
12 |
10 |
7 |
4 |
+1 |
-3 |
-8 |
23 |
| 24 |
23 |
21 |
19 |
18 |
16 |
14 |
11 |
9 |
6 |
3 |
-1 |
-5 |
24 |
| 25 |
24 |
22 |
21 |
19 |
17 |
15 |
13 |
11 |
8 |
5 |
+2 |
-2 |
25 |
| 26 |
25 |
23 |
22 |
20 |
18 |
16 |
14 |
12 |
10 |
7 |
4 |
0 |
26 |
| 27 |
26 |
24 |
23 |
21 |
20 |
18 |
16 |
14 |
11 |
9 |
6 |
+3 |
27 |
| 28 |
27 |
25 |
24 |
22 |
21 |
19 |
17 |
15 |
13 |
11 |
8 |
5 |
28 |
| 29 |
28 |
26 |
25 |
24 |
22 |
20 |
19 |
17 |
14 |
12 |
10 |
7 |
29 |
| 30 |
29 |
27 |
26 |
25 |
23 |
22 |
20 |
18 |
16 |
14 |
11 |
9 |
30 |
| 31 |
30 |
29 |
27 |
26 |
24 |
23 |
21 |
19 |
18 |
15 |
13 |
11 |
31 |
| 32 |
31 |
30 |
28 |
27 |
26 |
24 |
22 |
21 |
19 |
17 |
15 |
13 |
32 |
| 33 |
31 |
31 |
29 |
28 |
26 |
25 |
23 |
22 |
19 |
18 |
16 |
14 |
33 |
| 34 |
32 |
32 |
30 |
29 |
27 |
26 |
24 |
24 |
21 |
20 |
18 |
16 |
34 |
| 35 |
33 |
32 |
31 |
30 |
29 |
28 |
26 |
25 |
23 |
22 |
20 |
18 |
35 |
| 36 |
35 |
34 |
32 |
31 |
30 |
29 |
27 |
26 |
24 |
23 |
21 |
19 |
36 |
| 37 |
36 |
35 |
33 |
32 |
31 |
30 |
28 |
27 |
26 |
24 |
22 |
21 |
37 |
| 38 |
37 |
36 |
34 |
33 |
32 |
31 |
30 |
28 |
27 |
26 |
24 |
22 |
38 |
| 39 |
38 |
37 |
35 |
34 |
33 |
32 |
30 |
29 |
28 |
27 |
25 |
24 |
39 |
| 40 |
39 |
38 |
36 |
35 |
34 |
33 |
31 |
30 |
29 |
28 |
26 |
25 |
40 |
| 41 |
40 |
39 |
37 |
36 |
35 |
34 |
32 |
32 |
30 |
29 |
28 |
26 |
41 |
| 42 |
41 |
40 |
39 |
38 |
36 |
35 |
34 |
33 |
31 |
30 |
29 |
27 |
42 |
| 43 |
42 |
41 |
40 |
39 |
37 |
36 |
35 |
34 |
32 |
31 |
30 |
29 |
43 |
| 44 |
43 |
42 |
41 |
40 |
38 |
37 |
36 |
35 |
33 |
32 |
31 |
30 |
44 |
| 45 |
44 |
43 |
42 |
41 |
40 |
39 |
37 |
36 |
34 |
33 |
32 |
31 |
45 |
| 46 |
45 |
44 |
43 |
42 |
41 |
40 |
38 |
37 |
36 |
35 |
33 |
32 |
46 |
| 47 |
46 |
45 |
44 |
43 |
42 |
41 |
40 |
39 |
37 |
36 |
34 |
33 |
47 |
| 48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
40 |
38 |
37 |
36 |
35 |
48 |
| 49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
39 |
38 |
37 |
36 |
49 |
| 50 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
40 |
38 |
37 |
50 |
| 51 |
50 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
39 |
38 |
51 |
| 52 |
51 |
50 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
40 |
52 |
| 53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
53 |
| 54 |
53 |
52 |
51 |
50 |
50 |
49 |
47 |
46 |
45 |
44 |
43 |
42 |
54 |
| 55 |
54 |
53 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
44 |
43 |
55 |
| 56 |
55 |
54 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
45 |
44 |
56 |
| 57 |
56 |
55 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
57 |
| 58 |
57 |
56 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
58 |
| 59 |
58 |
57 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
59 |
| 60 |
59 |
58 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
60 |
| 61 |
60 |
59 |
59 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
61 |
| 62 |
61 |
60 |
60 |
59 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
52 |
62 |
| 63 |
62 |
61 |
61 |
60 |
59 |
58 |
57 |
56 |
55 |
55 |
54 |
53 |
63 |
| 64 |
63 |
62 |
62 |
61 |
60 |
59 |
58 |
57 |
56 |
56 |
55 |
54 |
64 |
| 65 |
64 |
63 |
63 |
62 |
61 |
60 |
59 |
59 |
58 |
57 |
56 |
55 |
65 |
| 66 |
65 |
64 |
64 |
63 |
62 |
61 |
60 |
60 |
59 |
58 |
57 |
56 |
66 |
| 67 |
67 |
66 |
65 |
64 |
63 |
62 |
61 |
61 |
60 |
59 |
58 |
57 |
67 |
| 68 |
68 |
67 |
66 |
65 |
64 |
63 |
62 |
62 |
61 |
60 |
59 |
58 |
68 |
| 69 |
69 |
68 |
67 |
66 |
65 |
64 |
63 |
63 |
62 |
61 |
60 |
59 |
69 |
| 70 |
70 |
69 |
68 |
67 |
67 |
66 |
65 |
64 |
63 |
62 |
61 |
61 |
70 |
| 71 |
71 |
70 |
69 |
68 |
68 |
67 |
66 |
65 |
64 |
63 |
62 |
62 |
71 |
| 72 |
72 |
71 |
70 |
69 |
69 |
68 |
67 |
66 |
65 |
64 |
63 |
63 |
72 |
| 73 |
73 |
72 |
71 |
70 |
70 |
69 |
68 |
67 |
66 |
66 |
65 |
64 |
73 |
| 74 |
74 |
73 |
72 |
71 |
71 |
70 |
69 |
68 |
67 |
67 |
66 |
65 |
74 |
| 75 |
75 |
74 |
73 |
72 |
72 |
71 |
70 |
69 |
68 |
68 |
67 |
66 |
75 |
| 76 |
76 |
75 |
74 |
73 |
73 |
72 |
71 |
70 |
69 |
69 |
68 |
67 |
76 |
| 77 |
77 |
76 |
75 |
74 |
74 |
73 |
72 |
71 |
70 |
70 |
69 |
68 |
77 |
| 78 |
78 |
77 |
76 |
75 |
75 |
74 |
73 |
72 |
71 |
71 |
70 |
69 |
78 |
| 79 |
79 |
78 |
77 |
76 |
76 |
75 |
74 |
73 |
72 |
72 |
71 |
70 |
79 |
| 80 |
80 |
79 |
78 |
77 |
77 |
76 |
75 |
74 |
73 |
73 |
72 |
72 |
80 |
| t. |
0°.5 |
1°.0 |
1°.5 |
2°.0 |
2°.5 |
3°.0 |
3°.5 |
4°.0 |
4°.5 |
5°.0 |
5°.5 |
6°.0 |
t. |
Table I.—Temperature of the Dew-Point, in Degrees Fahrenheit.
| t |
Difference between the dry and wet thermometers (t-t′). |
t |
| (Dry ther.) |
6°.0 |
6°.5 |
7°.0 |
7°.5 |
8°.0 |
8°.5 |
9°.0 |
9°.5 |
10°.0 |
10°.5 |
11°.0 |
11°.5 |
12°.0 |
(Dry ther.) |
| 19 |
-25 |
|
|
|
|
|
|
|
|
|
|
|
|
19 |
| 20 |
-19 |
-32 |
|
|
|
|
|
|
|
|
|
|
|
20 |
| 21 |
-15 |
-24 |
-47 |
|
|
|
|
|
|
|
|
|
|
21 |
| 22 |
-11 |
-19 |
-31 |
|
|
|
|
|
|
|
|
|
|
22 |
| 23 |
-8 |
-14 |
-24 |
-45 |
|
|
|
|
|
|
|
|
|
23 |
| 24 |
-5 |
-10 |
-18 |
-30 |
|
|
|
|
|
|
|
|
|
24 |
| 25 |
-2 |
-7 |
-13 |
-22 |
-42 |
|
|
|
|
|
|
|
|
25 |
| 26 |
0 |
-4 |
-9 |
-17 |
-28 |
|
|
|
|
|
|
|
|
26 |
| 27 |
+3 |
-1 |
-6 |
-12 |
-20 |
-37 |
|
|
|
|
|
|
|
27 |
| 28 |
5 |
+1 |
-3 |
-8 |
-15 |
-25 |
-54 |
|
|
|
|
|
|
28 |
| 29 |
7 |
4 |
0 |
-4 |
-10 |
-18 |
-32 |
|
|
|
|
|
|
29 |
| 30 |
9 |
6 |
+2 |
-2 |
-6 |
-13 |
-22 |
-43 |
|
|
|
|
|
30 |
| 31 |
11 |
8 |
5 |
+1 |
-3 |
-8 |
-15 |
-27 |
|
|
|
|
|
31 |
| 32 |
13 |
10 |
7 |
4 |
0 |
-4 |
-10 |
-18 |
-33 |
|
|
|
|
32 |
| 33 |
14 |
12 |
9 |
6 |
+3 |
-1 |
-6 |
-12 |
-22 |
-44 |
|
|
|
33 |
| 34 |
16 |
14 |
11 |
8 |
6 |
+2 |
-2 |
-8 |
-15 |
-27 |
|
|
|
34 |
| 35 |
18 |
15 |
13 |
10 |
8 |
5 |
+1 |
-4 |
-9 |
-18 |
-32 |
|
|
35 |
| 36 |
19 |
17 |
15 |
12 |
10 |
8 |
4 |
0 |
-5 |
-12 |
-20 |
-42 |
|
36 |
| 37 |
21 |
19 |
17 |
14 |
12 |
9 |
6 |
+3 |
-2 |
-6 |
-14 |
-25 |
-52 |
37 |
| 38 |
22 |
20 |
19 |
16 |
14 |
11 |
9 |
6 |
+2 |
-2 |
-8 |
-16 |
-29 |
38 |
| 39 |
24 |
22 |
20 |
18 |
16 |
14 |
11 |
8 |
5 |
+1 |
-4 |
-10 |
-18 |
39 |
| 40 |
25 |
23 |
22 |
20 |
18 |
16 |
13 |
11 |
8 |
4 |
0 |
-5 |
-12 |
40 |
| 41 |
26 |
25 |
23 |
21 |
20 |
17 |
15 |
13 |
10 |
7 |
+4 |
-1 |
-6 |
41 |
| 42 |
27 |
26 |
24 |
23 |
21 |
19 |
18 |
15 |
12 |
10 |
7 |
+3 |
-2 |
42 |
| 43 |
29 |
27 |
26 |
24 |
23 |
21 |
19 |
17 |
14 |
12 |
9 |
6 |
+2 |
43 |
| 44 |
30 |
28 |
27 |
26 |
24 |
22 |
20 |
18 |
16 |
14 |
12 |
9 |
6 |
44 |
| 45 |
31 |
30 |
28 |
27 |
25 |
24 |
22 |
20 |
18 |
16 |
13 |
11 |
8 |
45 |
| 46 |
32 |
31 |
30 |
28 |
27 |
25 |
24 |
22 |
20 |
18 |
16 |
13 |
11 |
46 |
| 47 |
33 |
32 |
31 |
29 |
28 |
26 |
25 |
23 |
22 |
20 |
18 |
15 |
13 |
47 |
| 48 |
35 |
33 |
32 |
30 |
29 |
28 |
26 |
25 |
23 |
21 |
20 |
17 |
15 |
48 |
| 49 |
36 |
34 |
33 |
32 |
31 |
29 |
28 |
26 |
25 |
23 |
21 |
19 |
17 |
49 |
| 50 |
37 |
35 |
34 |
33 |
32 |
31 |
29 |
28 |
26 |
24 |
23 |
21 |
19 |
50 |
| 51 |
38 |
37 |
36 |
34 |
33 |
32 |
31 |
29 |
28 |
26 |
24 |
22 |
21 |
51 |
| 52 |
40 |
38 |
37 |
36 |
34 |
33 |
32 |
30 |
29 |
28 |
26 |
24 |
23 |
52 |
| 53 |
41 |
39 |
38 |
37 |
36 |
34 |
33 |
32 |
30 |
29 |
28 |
26 |
24 |
53 |
| 54 |
42 |
41 |
40 |
39 |
37 |
36 |
34 |
33 |
32 |
30 |
29 |
27 |
26 |
54 |
| 55 |
43 |
42 |
41 |
40 |
39 |
37 |
36 |
34 |
33 |
32 |
30 |
29 |
28 |
55 |
| 56 |
44 |
43 |
42 |
41 |
40 |
39 |
37 |
36 |
34 |
33 |
32 |
30 |
29 |
56 |
| 57 |
46 |
45 |
44 |
42 |
41 |
40 |
39 |
37 |
36 |
35 |
33 |
32 |
30 |
57 |
| 58 |
47 |
46 |
45 |
44 |
42 |
41 |
40 |
39 |
37 |
36 |
35 |
33 |
32 |
58 |
| 59 |
48 |
47 |
46 |
45 |
44 |
43 |
41 |
40 |
39 |
38 |
36 |
35 |
33 |
59 |
| 60 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
41 |
40 |
39 |
38 |
36 |
35 |
60 |
| 61 |
50 |
49 |
48 |
47 |
46 |
45 |
44 |
43 |
42 |
41 |
39 |
38 |
36 |
61 |
| 62 |
52 |
51 |
50 |
49 |
48 |
47 |
45 |
44 |
43 |
42 |
41 |
39 |
38 |
62 |
| 63 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
45 |
44 |
43 |
42 |
41 |
39 |
63 |
| 64 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
45 |
43 |
42 |
41 |
64 |
| 65 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
45 |
43 |
42 |
65 |
| 66 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
47 |
46 |
45 |
44 |
66 |
| 67 |
57 |
56 |
55 |
55 |
54 |
53 |
52 |
51 |
50 |
48 |
47 |
46 |
45 |
67 |
| 68 |
58 |
57 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
47 |
46 |
68 |
| 69 |
59 |
58 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
48 |
69 |
| 70 |
61 |
60 |
59 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
51 |
50 |
49 |
70 |
| 71 |
62 |
61 |
60 |
59 |
58 |
57 |
56 |
55 |
55 |
54 |
53 |
52 |
51 |
71 |
| 72 |
63 |
62 |
61 |
60 |
59 |
59 |
58 |
57 |
56 |
55 |
54 |
53 |
52 |
72 |
| 73 |
64 |
63 |
62 |
62 |
61 |
60 |
59 |
58 |
57 |
56 |
55 |
54 |
53 |
73 |
| 74 |
65 |
64 |
63 |
63 |
62 |
61 |
60 |
59 |
58 |
57 |
56 |
55 |
54 |
74 |
| 75 |
66 |
65 |
64 |
64 |
63 |
62 |
61 |
60 |
59 |
58 |
57 |
56 |
56 |
75 |
| 76 |
67 |
66 |
65 |
65 |
64 |
63 |
62 |
61 |
61 |
60 |
59 |
58 |
57 |
76 |
| 77 |
68 |
67 |
67 |
66 |
65 |
64 |
63 |
62 |
62 |
61 |
60 |
59 |
58 |
77 |
| 78 |
69 |
68 |
68 |
67 |
66 |
66 |
65 |
64 |
63 |
62 |
61 |
60 |
59 |
78 |
| 79 |
70 |
69 |
69 |
68 |
67 |
67 |
66 |
65 |
64 |
63 |
62 |
61 |
61 |
79 |
| 80 |
72 |
71 |
70 |
69 |
68 |
68 |
67 |
66 |
65 |
64 |
63 |
62 |
62 |
80 |
| t. |
6°.0 |
6°.5 |
7°.0 |
7°.5 |
8°.0 |
8°.5 |
9°.0 |
9°.5 |
10°.0 |
10°.5 |
11°.0 |
11°.5 |
12°.0 |
t. |