Show HOW TO MEASURE HUMIDITY device that 1 bonit Co nIt of combination of two ohp momet ert and acl of water ton do not have to invest in a barometer or expend your personal mol ture by hurrying to the nearest ob erv atory whether at a drug store of t a weather bureau to ascertain the degree of humidity from power one seta this hint the instrument in the weather bureau kiosk marked relative humidity Is supposed to show the percentage by weight of water vapor in the air par cent being when the atmosphere can hold no more lit the form of steam the maximum weight of steam that the atmosphere is capable of holding Is dependent on and increases with an increase of the temperature the action of this hydrometer depends on the expansion and contraction in length of a hair or fiber as it increased In creasea or decreases in moisture content another device tor measuring the relative humidity Is a combination con of two ordinary thermometers one having the bulb covered with a wet cloth or a wick extending into a ves eel of water in the usa of this in the wet bulb and the dry bulb temperatures are taken if they are the came the humidity Is per cent but when there Is a difference it 9 necessary to consult tables in order to obtain the relative humidity |