Leaf beginning "Pelouze and Cahours examined the Pensylvanian [sic] oils and find it to contain homologues of Marsh gas," written on the verso of note stationery from Sparks and Simms, Pharmaceutists, cor, 14th street [sic] and New York Avenue

Leaf beginning "Pelouze and Cahours examined the Pensylvanian [sic] oils and find it to contain homologues of Marsh gas," written on the verso of note stationery from Sparks and Simms, Pharmaceutists, cor, 14th street [sic] and New York Avenue, Box: 1, Folder: 18. 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/382371 Accessed January 01, 2026.