Yerkes, A.P.2019-06-132019-06-131924http://hdl.handle.net/10919/90109Draft of report detailing productivity of farmers and the use of machinery in farming.US LetterCreative Commons Public Domain Mark 1.0Farm Operating EquipmentFarm Operating EquipmentFarm Power and MachineryGas Engines and TractorsApplied SciencesAgricultureAgricultural EngineeringVirginia Extension – Project 10Report of Farm Power Committee with Cover Letter, Novenber 10, 1924ReportBiological Systems Engineering, Virginia Tech