Orchard heaters, 1951
Caption slip reads: "Photographer: Richardson. Date: 1951-10-05. Reporter: Swaim. Assignment: Orchard heaters. K19, 20: Edwin Jobe with older type orchard heater, (smoke maker). K11, 12: Edwin Jobe stepping back from greater heat of new nearly smokeless type. Heater is actually burning, no smoke visible. K5, 6, 21, 22: Both types: old one (smaller) smoking, while new type in background gives greater heat, no smoke".