Letter from the Secretary of the Treasury, communicating a report of the computation of tables, to be used with the hydrometer recently adopted for use in the United States Custom-houses, made under the superintendence of Professor A.D. Bache, by Professor R.S. McCulloh. February 10, 1851. Referred to the Committee on Finance. February 11, 1851. Committee discharged. February 14, 1851. Ordered to be printed ; and that 3,000 additional copies be printed -- 1,500 of which for the use of the Senate, and the remainder for the use of the Treasury Department

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