Improved Method of Feathering the Sails of Vanes of Windmills.
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Improved Method of Feathering the Sails of Vanes of Windmills., patent, March 31, 1857; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth165050/: accessed March 28, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.