Sanborn Map CompanyScale 1:600. 50 ft to an inchPublished August 1891.On pages 3-4: Birds eye view of the Chicago packing houses & Union Stock Yards / published by the Rascher Insurance Map Publ. Co.1 atlas (39 pages) : color65 cmJPEGoai:digital.library.illinois.edu:9086b5d0-bcd4-013a-c42a-02d0d7bfd6e4-e99955005926605899engRascher Insurance Map Publishing Company8888-002PublicAtlas of the Chicago packing houses and Union Stock YardsMapsIllinois--ChicagoIllinois1891University of Illinois Urbana-Champaign