Rotary Valve for Steam-Engines., patent, September 18, 1894; (https://texashistory.unt.edu/ark:/67531/metapth173801/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Rotary Valve for Steam-Engines., patent, September 18, 1894; (https://texashistory.unt.edu/ark:/67531/metapth173801/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .