MCC also worked to develop solar dryers to help farmers preserve their harvest. MCC worker Stuart Clark of Whitehorse, Yukon Territory, painted the mud-wall dryer shown in this 1979 photo with a mixture of flour, powdered charcoal and water. It sits on and is covered with plastic. A bamboo tray holds the food. Holes in the mud base allow cold drier air to enter; a hole at the plastic's top allows warm air to escape. Pointed toward the south, the dryer operates from 9 a.m. to 3 p.m.