Catalog no. 200: Buffalo planoidal fans
A 1915 trade catalogue issued by the Buffalo Forge Company of Buffalo, New York, presenting its planoidal fans for heating, ventilation and air-conditioning engineers and building contractors. Its pictures are plain factory-style photographs and engineering line drawings of fan housings, with dimensioned plan and elevation views that a designer could use for studying mechanical form, bolted sheet-metal construction and the rivet-line detailing of industrial equipment.
