Interstate Compact Supervision. The Interstate Compact is a federal agreement that provides guidelines for the transfer of offender supervision among all 50 states and most U.S. territories.nterstate Compact Supervision. The Interstate Compact is a federal agreement that provides guidelines for the transfer of offender supervision among all 50 states and most U.S. territories.
Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer. A psychrometer uses two thermometers to measure relative humidity; one measures the dry-bulb temperature and the other measures the wet-bulb temperature.
Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity. 1  Mechanical hygrometers make use of the principle that organic substances (particularly finer substances such as goldbeaterâs skin [ox gut] and human hair) contract and expand in response to the humidity. Contraction and expansion of the hair element in a mechanical hygrometer causes the spring to move the needle on the dial.