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  • All fields: 11.6 x 9.0 cm
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    • Refrigerated super centrifuge, 1951

    • Chemistry; Laboratory; Iowa State University;
    • G. F. Hanna, a graduate student in the Department of Chemistry and a research fellow of the Agricultural Experiment Station, showing the refrigerated super centrifuge along with the refrigerated bath. The room was maintained at a temperature just...
    • Craig Liquid Extraction Apparatus, 1951

    • Chemistry; Laboratory; Equipment; Iowa State University;
    • Frank Janssen, a graduate student in chemistry, with a Craig Liquid Extraction Apparatus. This apparatus, invented by Dr. Lyman Craig, an Iowa State alumnus, was widely used for separating medicinal and other biologically important materials. It...

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