The other form of water removed is the vapor content
of air, leaving the dryer through an opening at the bottom end of the dryer. The water content
of the air is measured through the dry bulb and wet bulb temperature, and the moisture lost as
condensate can be volumetrically measured in the container to which it was directed. The
amount of air leaving has to be measured to give an indication of the actual amount of water
lost to the air