======+=============================================================================+====== _t_ | Difference between the dry and wet thermometers (_t-t′_). | _t_ (Dry +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+(Dry ther.)|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|ther.) ------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+------- 55 | 6 | 1 | | | | | | | | | | | | 55 56 | 8 | 3 | | | | | | | | | | | | 56 57 | 9 | 5 | | | | | | | | | | | | 57 58 | 11 | 7 | 2 | | | | | | | | | | | 58 59 | 12 | 8 | 4 | | | | | | | | | | | 59 | | | | | | | | | | | | | | 60 | 14 | 10 | 6 | 2 | | | | | | | | | | 60 61 | 15 | 11 | 7 | 3 | | | | | | | | | | 61 62 | 16 | 13 | 9 | 5 | 1 | | | | | | | | | 62 63 | 18 | 14 | 10 | 7 | 3 | | | | | | | | | 63 64 | 19 | 15 | 12 | 8 | 5 | 1 | | | | | | | | 64 | | | | | | | | | | | | | | 65 | 20 | 17 | 13 | 10 | 6 | 3 | | | | | | | | 65 66 | 22 | 18 | 14 | 11 | 8 | 4 | 1 | | | | | | | 66 67 | 23 | 19 | 16 | 12 | 9 | 6 | 2 | | | | | | | 67 68 | 24 | 20 | 17 | 14 | 10 | 7 | 4 | 1 | | | | | | 68 69 | 25 | 22 | 18 | 15 | 12 | 8 | 5 | 2 | | | | | | 69 | | | | | | | | | | | | | | 70 | 26 | 23 | 19 | 16 | 13 | 10 | 7 | 4 | 1 | | | | | 70 71 | 27 | 24 | 20 | 17 | 14 | 11 | 8 | 5 | 2 | | | | | 71 72 | 28 | 24 | 22 | 18 | 15 | 12 | 9 | 6 | 3 | 1 | | | | 72 73 | 29 | 25 | 22 | 19 | 16 | 13 | 10 | 8 | 5 | 2 | | | | 73 74 | 30 | 26 | 23 | 20 | 18 | 15 | 12 | 9 | 6 | 3 | 1 | | | 74 | | | | | | | | | | | | | | 75 | 31 | 27 | 24 | 21 | 19 | 16 | 13 | 10 | 7 | 5 | 2 | | | 75 76 | 31 | 28 | 25 | 22 | 20 | 17 | 14 | 11 | 8 | 6 | 3 | 1 | | 76 77 | 32 | 29 | 26 | 23 | 20 | 18 | 15 | 12 | 10 | 7 | 4 | 2 | | 77