5954277 Internal Revenue Bureau Chemist G.F. Beyer, 14 January 1920 (b/w photo) by American Photographer, (20th century); Private Collection; (add.info.: Chemist G. F. Beyer, of the Internal Revenue Bureau, making the fuse oil test for coloring matter in a half pint bottle of a bootleggars ware. With the addition of fuse oil the matter used to give whiskey color separates from the other ingredients.); American, out of copyright.