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  • All fields: 24.1 x 19.5 cm
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    • Pulverator and drill, 1925

    • Farm Equipment; Agriculture; Iowa State University;
    • The operation of a pulverator and drill in an untilled field. The tractor pulling the machinery has unusually light and narrow steel wheels. The photograph is from the rear. A roadway fence line at the edge of the field is in the middle distance.
    • Students in chemistry laboratory, 1900

    • Chemistry; Laboratory; Iowa State University;
    • Men and women in a college chemistry laboratory. An adjoining laboratory, full of students, can be seen through a double arched doorway. A female student in the foreground appears to be wearing one of the men's hats.

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