======+===========================================================+====== _t_ | Difference between the dry and wet thermometers (_t-t′_). | _t_ (Dry +----+----+----+----+----+----+----+----+----+----+----+----+(Dry ther.)|0°.5|1°.0|1°.5|2°.0|2°.5|3°.0|3°.5|4°.0|4°.5|5°.0|5°.5|6°.0|ther.) ------+----+----+----+----+----+----+----+----+----+----+----+----+------ 20 | 18 | 17 | 15 | 13 | 10 | 8 | 5 | 2 | -2 | -6 |-12 |-19 | 20 21 | 19 | 18 | 16 | 14 | 12 | 9 | 7 | 4 | 0 | -4 | -8 |-15 | 21 22 | 20 | 19 | 17 | 15 | 13 | 11 | 8 | 6 | +2 | -1 | -6 |-11 | 22 23 | 22 | 20 | 18 | 16 | 14 | 12 | 10 | 7 | 4 | +1 | -3 | -8 | 23 24 | 23 | 21 | 19 | 18 | 16 | 14 | 11 | 9 | 6 | 3 | -1 | -5 | 24 | | | | | | | | | | | | | 25 | 24 | 22 | 21 | 19 | 17 | 15 | 13 | 11 | 8 | 5 | +2 | -2 | 25 26 | 25 | 23 | 22 | 20 | 18 | 16 | 14 | 12 | 10 | 7 | 4 | 0 | 26 27 | 26 | 24 | 23 | 21 | 20 | 18 | 16 | 14 | 11 | 9 | 6 | +3 | 27 28 | 27 | 25 | 24 | 22 | 21 | 19 | 17 | 15 | 13 | 11 | 8 | 5 | 28 29 | 28 | 26 | 25 | 24 | 22 | 20 | 19 | 17 | 14 | 12 | 10 | 7 | 29 | | | | | | | | | | | | | 30 | 29 | 27 | 26 | 25 | 23 | 22 | 20 | 18 | 16 | 14 | 11 | 9 | 30 31 | 30 | 29 | 27 | 26 | 24 | 23 | 21 | 19 | 18 | 15 | 13 | 11 | 31 32 | 31 | 30 | 28 | 27 | 26 | 24 | 22 | 21 | 19 | 17 | 15 | 13 | 32 33 | 31 | 31 | 29 | 28 | 26 | 25 | 23 | 22 | 19 | 18 | 16 | 14 | 33 34 | 32 | 32 | 30 | 29 | 27 | 26 | 24 | 24 | 21 | 20 | 18 | 16 | 34 | | | | | | | | | | | | | 35 | 33 | 32 | 31 | 30 | 29 | 28 | 26 | 25 | 23 | 22 | 20 | 18 | 35 36 | 35 | 34 | 32 | 31 | 30 | 29 | 27 | 26 | 24 | 23 | 21 | 19 | 36 37 | 36 | 35 | 33 | 32 | 31 | 30 | 28 | 27 | 26 | 24 | 22 | 21 | 37 38 | 37 | 36 | 34 | 33 | 32 | 31 | 30 | 28 | 27 | 26 | 24 | 22 | 38 39 | 38 | 37 | 35 | 34 | 33 | 32 | 30 | 29 | 28 | 27 | 25 | 24 | 39 | | | | | | | | | | | | | 40 | 39 | 38 | 36 | 35 | 34 | 33 | 31 | 30 | 29 | 28 | 26 | 25 | 40 41 | 40 | 39 | 37 | 36 | 35 | 34 | 32 | 32 | 30 | 29 | 28 | 26 | 41 42 | 41 | 40 | 39 | 38 | 36 | 35 | 34 | 33 | 31 | 30 | 29 | 27 | 42 43 | 42 | 41 | 40 | 39 | 37 | 36 | 35 | 34 | 32 | 31 | 30 | 29 | 43 44 | 43 | 42 | 41 | 40 | 38 | 37 | 36 | 35 | 33 | 32 | 31 | 30 | 44 | | | | | | | | | | | | | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 37 | 36 | 34 | 33 | 32 | 31 | 45 46 | 45 | 44 | 43 | 42 | 41 | 40 | 38 | 37 | 36 | 35 | 33 | 32 | 46 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 37 | 36 | 34 | 33 | 47 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 38 | 37 | 36 | 35 | 48 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 39 | 38 | 37 | 36 | 49 | | | | | | | | | | | | |