Table 2 - Temperature of dew point in degrees Fahrenheit

[Pressure = 29.00 inches]

Air
Temp
t

Vapor
Press.
e

Depression of wet-bulb thermometer (t-t')
16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5 24.0
49 0.347 -28
50 0.360 -17 -32
51 0.373 -10 -18 -37                          
52 0.387 -4 -11 -20 -45
53 0.402 0 -5 -12 -23 -55
54 0.417 +5 0 -6 -13 -25
55 0.432 8 +4 -1 -6 -14 -27
56 0.448 11 7 +4 -1 -7 -16 -30                  
57 0.465 13 10 9 +3 -2 -8 -17 -33
58 0.482 16 13 10 7 +3 -2 -9 -18 -37
59 0.499 18 16 13 10 7 +2 -3 -9 -19 -41
60 0.517 20 18 16 13 10 6 +2 -3 -10 -20 -46
61 0.536 22 20 18 16 13 10 6 +2 -3 -10 -21 -51        
62 0.555 24 22 20 18 16 13 10 6 +2 -4 -11 -22 -59
63 0.575 26 24 22 20 18 16 13 10 6 +2 -4 -11 -23
64 0.595 28 26 25 23 21 18 16 13 10 6 +1 -4 -12 -24
65 0.616 30 28 26 25 23 21 18 16 13 10 6 +1 -4 -12 -25
66 0.638 31 30 28 27 25 23 21 18 16 13 10 6 +1 -4 -12 -25
67 0.661 33 32 30 29 27 25 23 21 19 16 13 10 6 +1 -4 -12
68 0.684 35 33 32 30 29 27 25 23 21 19 16 13 10 6 +1 -4
69 0.707 37 35 34 32 31 29 27 25 23 21 19 16 13 10 6 +1
70 0.732 38 37 35 34 32 31 29 27 25 23 21 19 16 13 10 6
71 0.757 40 38 37 36 34 32 31 29 27 26 24 21 19 17 14 10
72 0.783 42 40 39 37 36 34 32 61 29 28 26 24 21 19 17 14
73 0.810 43 42 40 39 38 36 34 33 31 30 28 26 24 22 19 17
74 0.838 45 43 42 41 39 38 36 35 33 32 30 28 26 24 22 20
75 0.866 46 45 44 42 41 40 38 37 35 33 32 30 28 26 24 22
76 0.896 48 46 45 44 43 41 40 38 37 35 34 32 30 29 27 25
77 0.926 49 48 47 46 44 43 42 40 39 37 36 34 32 31 29 27
78 0.957 50 49 48 47 46 44 43 42 41 39 38 36 34 33 31 29
79 0.989 52 51 50 49 47 46 45 44 42 41 39 38 36 35 33 31
80 1.022 53 52 51 50 49 48 46 45 44 43 41 40 38 37 35 33