A series of three experiments were conducted to measure the effects of temperature, time, and direction of aeration on the amount of drying accomplished by aerating seedcotton on a wire mesh conveyor belt. Aeration downwards through the cotton was nearly twice as effective in reducing moisture content as aeration upward. Increasing time or temperature increased the amount of moisture removed. Heat utilization efficiency was approximately twice that reported for a tower dryer system. Rate of drying decreased with time for a given set of conditions. A drying front was forced through an 18 inch depth of cotton in about 65 seconds with downward aeration at 50 cubic feet of air per minute per square foot of belt surface.