Emmissivity of heat from various surfaces with special reference to warm-air furnace installations; results of comparative tests on covered and uncovered sheet metal surfaces made in connection with the warm-air furnace investigation conducted by the Engineering Experiment Station, University of Illinois, in coöperation with the National Warm-air Heating and Ventilating Association
Day, Vincent S. (Vincent Stephen), 1894-; National Warm Air Heating and Ventilating Association (U.S.); University of Illinois (Urbana-Champaign campus). Engineering Experiment Station