+-------------+-----------------------------------------+ | |DIFFERENCE BETWEEN DRY BULB AND WET BULB | | | READINGS. | |TEMPERATURE +------+------+------+------+------+------+ | BY THE | | | | | | | | DRY BULB | 2° | 4° | 6° | 8° | 10° | 12° | |THERMOMETER. | | | | | | | | +------+------+------+------+------+------+ | | DEGREE OF HUMIDITY. | +-------------+------+------+------+------+------+------+ | 34° | 79 | 63 | 50 | ... | ... | ... | | 36 | 82 | 66 | 53 | ... | ... | ... | | 38 | 83 | 68 | 56 | 45 | ... | ... | | 40 | 84 | 70 | 58 | 47 | ... | ... | | 42 | 84 | 71 | 59 | 49 | ... | ... | | 44 | 85 | 72 | 60 | 50 | ... | ... | | 46 | 86 | 73 | 61 | 51 | ... | ... | | 48 | 86 | 73 | 62 | 52 | 44 | ... | | 50 | 86 | 74 | 63 | 53 | 45 | ... | | 52 | 86 | 74 | 64 | 54 | 46 | ... | | 54 | 86 | 74 | 64 | 55 | 47 | ... | | 56 | 87 | 75 | 65 | 56 | 48 | ... | | 58 | 87 | 76 | 66 | 57 | 49 | ... | | 60 | 88 | 76 | 66 | 58 | 50 | 43 | | 62 | 88 | 77 | 67 | 58 | 50 | 44 | | 64 | 88 | 77 | 67 | 59 | 51 | 45 | | 66 | 88 | 78 | 68 | 60 | 52 | 45 | | 68 | 88 | 78 | 68 | 60 | 52 | 46 | | 70 | 88 | 78 | 69 | 61 | 53 | 47 | | 72 | 89 | 79 | 69 | 61 | 54 | 48 | | 74 | 89 | 79 | 70 | 62 | 55 | 48 | | 76 | 89 | 79 | 71 | 63 | 55 | 49 | | 78 | 89 | 79 | 71 | 63 | 56 | 50 | | 80 | 90 | 80 | 71 | 63 | 56 | 50 | | 82 | 90 | 80 | 72 | 64 | 57 | 51 | | 84 | 90 | 80 | 72 | 64 | 57 | 51 | | 86 | 90 | 80 | 72 | 64 | 58 | 52 | +-------------+------+------+------+------+------+------+ The total quantity of aqueous vapour which at any temperature can be diffused in the air being represented by 100, the percentage of vapour actually present will be found in the table _opposite_ the temperature of the dry thermometer, and _under_ the difference between the dry bulb and wet bulb temperatures. The degree of humidity for intermediate temperatures and differences to those given in the table can be easily estimated. Thus dry bulb 51°, wet bulb 46°, give 69 for the degree of humidity.