78 | 47 | 44 | 41 | 38 | 35 | 32 | 28 | 24 | 20 | 14 | 7 | -4 | -30 | 78 79 | 48 | 46 | 43 | 40 | 37 | 34 | 31 | 27 | 23 | 18 | 11 | +2 | -13 | 79 | | | | | | | | | | | | | | 80 | 50 | 47 | 45 | 42 | 39 | 36 | 32 | 29 | 25 | 21 | 15 | 8 | -3 | 80 ------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+------ _t_ |18°.0|19°.0|20°.0|21°.0|22°.0|23°.0|24°.0|25°.0|26°.0|27°.0|28°.0|29°.0|30°.0| _t_ ======+=====+=====+=====+=====+=====+=====+=====+=====+=====+=====+=====+=====+=====+====== TABLE I.——TEMPERATURE OF THE DEW-POINT, IN DEGREES FAHRENHEIT. ======+==============================================================+====== _t_ | Difference between the dry and wet thermometers (_t-t′_). | _t_ (Dry +----+----+----+----+----+----+----+----+----+-----+-----+-----+(Dry ther.)|1°.0|2°.0|3°.0|4°.0|5°.0|6°.0|7°.0|8°.0|9°.0|10°.0|11°.0|12°.0|ther.) ------+----+----+----+----+----+----+----+----+----+-----+-----+-----+------ 80 | 79 | 77 | 76 | 74 | 73 | 72 | 70 | 68 | 67 | 65 | 63 | 62 | 80 81 | 80 | 78 | 77 | 75 | 74 | 73 | 71 | 70 | 68 | 66 | 65 | 63 | 81 82 | 81 | 79 | 78 | 77 | 75 | 74 | 72 | 71 | 69 | 68 | 66 | 64 | 82 83 | 82 | 80 | 79 | 78 | 76 | 75 | 73 | 72 | 70 | 69 | 67 | 65 | 83 84 | 83 | 81 | 80 | 79 | 77 | 76 | 74 | 73 | 71 | 70 | 68 | 67 | 84 | | | | | | | | | | | | | 85 | 84 | 82 | 81 | 80 | 78 | 77 | 75 | 74 | 72 | 71 | 69 | 68 | 85 86 | 85 | 83 | 82 | 81 | 79 | 78 | 76 | 75 | 73 | 72 | 71 | 69 | 86 87 | 86 | 84 | 83 | 82 | 80 | 79 | 78 | 76 | 74 | 73 | 72 | 70 | 87 88 | 87 | 85 | 84 | 83 | 81 | 80 | 79 | 77 | 75 | 74 | 73 | 71 | 88 89 | 88 | 86 | 85 | 84 | 82 | 81 | 80 | 78 | 76 | 76 | 74 | 72 | 89 | | | | | | | | | | | | | 90 | 89 | 87 | 86 | 85 | 84 | 82 | 81 | 79 | 78 | 77 | 75 | 74 | 90 91 | 90 | 88 | 87 | 86 | 85 | 83 | 82 | 80 | 79 | 78 | 76 | 75 | 91 92 | 91 | 89 | 88 | 87 | 86 | 84 | 83 | 82 | 80 | 79 | 77 | 76 | 92 93 | 92 | 91 | 89 | 88 | 87 | 85 | 84 | 83 | 81 | 80 | 78 | 77 | 93 94 | 93 | 92 | 90 | 89 | 88 | 86 | 85 | 84 | 82 | 81 | 80 | 78 | 94 | | | | | | | | | | | | | 95 | 94 | 93 | 91 | 90 | 89 | 87 | 86 | 85 | 83 | 82 | 81 | 79 | 95 96 | 95 | 94 | 92 | 91 | 90 | 88 | 87 | 86 | 84 | 83 | 82 | 80 | 96 97 | 96 | 95 | 93 | 92 | 91 | 90 | 88 | 87 | 86 | 84 | 83 | 81 | 97 98 | 97 | 96 | 94 | 93 | 92 | 91 | 89 | 88 | 87 | 85 | 84 | 83 | 98 99 | 98 | 97 | 95 | 94 | 93 | 92 | 90 | 89 | 88 | 86 | 85 | 84 | 99 | | | | | | | | | | | | |