Two leaves beginning "Fractional distillation in its simplest form consists in distilling a liquid" and "Now suppose these different liquids to be distilled again separately", Box: 1, Folder: 6. Notes and annotations in 1859 edition of The Manufacture of Photogenic or Hydro-carbon Oils, MS C79. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/382359 Accessed June 02, 2024.