Improved Grain-Meter., patent, September 8, 1867; (https://texashistory.unt.edu/ark:/67531/metapth165139/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Improved Grain-Meter., patent, September 8, 1867; (https://texashistory.unt.edu/ark:/67531/metapth165139/m1/1/: accessed June 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .