Process of and Apparatus for Making Essences, patent, December 13, 1892; (https://texashistory.unt.edu/ark:/67531/metapth173246/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Process of and Apparatus for Making Essences, patent, December 13, 1892; (https://texashistory.unt.edu/ark:/67531/metapth173246/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .