This primary source comes from the Records of the U.S. House of Representatives.
Full Citation: Tariff Schedule for the Union Line Railroad; 1875; Committee Papers of the Committee on Commerce from the 44th Congress; (HR44A-F6.2); Committee Papers, 1819 - 1891; Records of the U.S. House of Representatives, Record Group 233; National Archives Building, Washington, DC. [Online Version, https://docsteach.org/documents/document/tariff-schedule-union-line, May 14, 2024]