Two leaves beginning "By submitting this asphalt to distillation on the large scale Behrens obtained ..." and "Ozokerite has been much used lately for the production of illuminating oils"

Two leaves beginning "By submitting this asphalt to distillation on the large scale Behrens obtained ..." and "Ozokerite has been much used lately for the production of illuminating oils", Box: 1, Folder: 4. 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/382357 Accessed December 31, 2025.