Improved Grain-Meter. Page: 1 of 2
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Improved Grain-Meter., patent, September 8, 1867; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth165139/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.