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  • All fields: 23.4 x 18.3 cm
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    • Agricultural by-products, 1937

    • Agricultural by-products, 1937

    • Iowa State University; Dept. of Chemical and Biological Engineering; Agricultural wastes

    • A group of large cylinders and tubs containing agricultural by-products are in the foreground. One of the cylinders is empty and waiting to be filled. There are towels hanging over the tubs and there is a large tank sitting on a table in the corner...
    • University Photographs
    • Horse-drawn mower, 1905

    • Horse-drawn mower, 1905

    • Farm Equipment; Agriculture; Iowa State University;

    • An enclosed-gear, steel-wheeled, two-hitch horse-drawn rider- operated bar mower being used in a hay field. The operator is driving the work horses away from the camera. One of the horses is wearing a leather fly skirt. A row of poplar trees runs...
    • University Photographs

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