Table 3 - Temperature of dew point in degrees Fahrenheit

[Pressure = 27.00 inches]

Air
Temp
t

Vapor
Press.
e

Depression of wet-bulb thermometer (t-t')
24.5 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 29.0 29.5 30.0 30.5 31.0 31.5 32.0
65 0.616 -29
66 0.638 -15 -30                            
67 0.661 -6 -15 -30
68 0.684 0 -6 -15 -30
69 0.707 +5 0 -6 -15 -30
70 0.732 9 +5 0 -6 -14 -30
71 0.757 12 9 +5 0 -6 -12 -29                  
72 0.783 15 12 9 +5 0 -5 -14 -28
73 0.810 18 16 13 10 +6 +1 -5 -13 -27
74 0.838 21 19 16 13 10 6 +1 -4 -12 -26
75 0.866 23 21 19 16 13 10 6 +2 -4 -12 -25
76 0.896 26 24 22 19 16 14 11 7 +2 -4 -11 -24        
77 0.926 28 26 24 22 20 17 14 11 7 +3 -3 -11 -23
78 0.957 30 28 26 24 22 20 17 14 11 8 +3 -2 -10 -21
79 0.989 32 30 28 27 25 23 20 18 15 12 8 +4 -2 -9 -20 -54
80 1.022 34 32 31 29 27 25 23 21 18 15 12 9 +4 -1 -8 -18