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AAA (Agricultural Adjustment Administration) office, Grundy County, Iowa. Tagg-Heppenstal electric moisture tester--tells instantly percent of water in grain; used in connection with wheat and storage loans. Sourced from the Library of Congress.

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AAA (Agricultural Adjustment Administration) office, Grundy County, Iowa. Tagg-Heppenstal electric moisture tester--tells instantly percent of water in grain; used in connection with wheat and storage loans. Sourced from the Library of Congress.

More