Improvement in Drawing Off Tallow, Lard &c., from Rendering-Tanks.
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Improvement in Drawing Off Tallow, Lard &c., from Rendering-Tanks., patent, June 7, 1870; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth165232/: accessed April 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.