Depression of the wet-bulb thermometer -----+----+----+----+----+----+----+----+----+----+----+----+----+---- Dry- | | | | | | | | | | | | | bulb | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 temp.| | | | | | | | | | | | | -----+----+----+----+----+----+----+----+----+----+----+----+----+---- 70 | 69 | 67 | 66 | 64 | 62 | 61 | 59 | 57 | 55 | 53 | 51 | 49 | 47 69 | 68 | 66 | 64 | 63 | 61 | 59 | 58 | 56 | 54 | 52 | 50 | 48 | 46 68 | 67 | 65 | 63 | 62 | 60 | 58 | 57 | 55 | 53 | 51 | 49 | 46 | 44 67 | 66 | 64 | 62 | 61 | 59 | 57 | 55 | 54 | 52 | 50 | 47 | 45 | 43 66 | 64 | 63 | 61 | 60 | 58 | 56 | 54 | 52 | 50 | 48 | 46 | 44 | 65 | 63 | 62 | 60 | 59 | 57 | 55 | 53 | 51 | 49 | 47 | 45 | 42 | 41 64 | 62 | 61 | 59 | 57 | 56 | 54 | 52 | 50 | 48 | 46 | 43 | | 40 63 | 61 | 60 | 58 | 56 | 55 | 53 | 51 | 49 | 47 | 44 | 42 | 41 | 38 62 | 60 | 59 | 57 | 55 | 53 | 52 | 50 | 48 | 45 | 43 | | 39 | 37 61 | 59 | 58 | 56 | 54 | 52 | 50 | 48 | 46 | 44 | 42 | 41 | 38 | 35 60 | 58 | 57 | 55 | 53 | 51 | 49 | 47 | 45 | 43 | | 39 | 36 | 33 59 | 57 | 56 | 54 | 52 | 50 | 48 | 46 | 44 | | 40 | 38 | 43 | 32 58 | 56 | 55 | 53 | 51 | 49 | 47 | 45 | 42 | 41 | 39 | 36 | 33 | 30 57 | 55 | 54 | 52 | 50 | 48 | 46 | 44 | | 40 | 37 | 35 | 31 | 28 56 | 54 | 53 | 51 | 49 | 47 | 44 | 42 | 41 | 39 | 36 | 33 | 30 | 26 55 | 53 | 52 | 50 | 48 | 46 | 43 | | 40 | 37 | 34 | 31 | 28 | 25 54 | 52 | 50 | 49 | 46 | 44 | 42 | 41 | 39 | 36 | 33 | 30 | 27 | 23 53 | 51 | 49 | 47 | 45 | 43 | | 40 | 37 | 34 | 31 | 28 | 25 | 20 52 | 50 | 48 | 46 | 44 | 42 | 41 | 38 | 36 | 33 | 30 | 27 | 23 | 18 51 | 49 | 47 | 45 | 43 | | 40 | 37 | 34 | 31 | 28 | 25 | 21 | 16 50 | 48 | 46 | 44 | 42 | 41 | 38 | 36 | 33 | 30 | 27 | 23 | 19 | 14 49 | 47 | 45 | 43 | | 40 | 37 | 34 | 31 | 28 | 25 | 21 | 17 | 11 48 | 46 | 44 | 42 | 41 | 38 | 36 | 33 | 30 | 27 | 23 | 19 | 14 | 9 47 | 45 | 43 | | 40 | 37 | 35 | 32 | 29 | 25 | 22 | 17 | 12 | 6 46 | 44 | 42 | 41 | 39 | 36 | 33 | 30 | 27 | 24 | 20 | 15 | 10 | 3 45 | 43 | | 40 | 37 | 35 | 32 | 29 | 26 | 22 | 18 | 13 | 7 | -1 44 | 42 | 41 | 39 | 36 | 33 | 30 | 27 | 24 | 20 | 16 | 11 | 4 | -5 | | 40 | 37 | 35 | 32 | 29 | 26 | 23 | 19 | 14 | 8 | 1 | -9 43 | 41 | 39 | 36 | 34 | 31 | 28 | 25 | 21 | 17 | 12 | 6 | -2 |-15 42 | 40 | 38 | 35 | 33 | 29 | 26 | 23 | 19 | 15 | 9 | 3 | -6 |-22 41 | 39 | 36 | 34 | 31 | 28 | 25 | 22 | 17 | 13 | 7 | 0 |-11 |-32 40 | 38 | 35 | 33 | 30 | 27 | 24 | 20 | 16 | 11 | 4 | -4 |-16 |-74 39 | 37 | 34 | 32 | 29 | 26 | 22 | 18 | 14 | 8 | 2 | -8 | 23 | 38 | 36 | 33 | 31 | 28 | 24 | 21 | 17 | 12 | -6 | -1 |-12 |-35 | -----+----+----+----+----+----+----+----+----+----+----+----+----+----