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  1. 1
    Wrought-iron beams. Letter from the Secretary of the Treasury, transmitting results of experiments made to test the strength of wrought-iron beams, &c.
    Published 1855
    “...Results of experiments made to test strength of wrought-iron beams and girders for buildings...”
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  2. 2
    Letter of the Secretary of the Treasury to Hon. Mr. Hunter, Chairman Committee on Finance, accompanied by a report relative to the use of wrought-iron beams and girders in the buildings authorized to be erected for the accommodation of United States courts, custom-houses, post offices, &c., and asking an appropriation for the complete testing of the strength of the same.
    Published 1855
    “...Report of experiments for testing strength of wrought iron beams and girders to be used...”
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