Home / Tag production /

Scientific American 1920-08-14

ScientificAmerican1920-08-14.jpg Scientific American 1920-08-07ThumbnailsScientific American 1920-09-18Scientific American 1920-08-07ThumbnailsScientific American 1920-09-18Scientific American 1920-08-07ThumbnailsScientific American 1920-09-18Scientific American 1920-08-07ThumbnailsScientific American 1920-09-18

Speeding up the hay harvest with the gasoline tractor, rake and stacker.