DescriptionLabor-saving synmotor in Popular Science 1919.png
English: A step on the road of agricultural mechanization with a wire-guided gasoline-powered cultivator in 1919.
Date
Source
Modern Publishing Company (1919-05), “This farm-hand never tires or asks for pay: sit on the porch and watch the synmotor work”, in Popular Science Monthly[1], volume 94, issue 5, page 77
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