Laserfiche WebLink
A hygrometer consisting essentially of two similar thermometers with <br />the bulb of one being kept wet so that the cooling that results from <br />evaporation makes it register a lower temperature than the dry one <br />and with the difference between the readings constituting a measure of <br />the dryness of the atmosphere. <br />Definition of PSYCHROMETER <br />http://www.merriam webster.com/dictionary/psychrometer <br />SSEBop Explained with the <br />“Psychrometry” Principle <br />Sling Psychorometer