Dr. H. M. Alexander & Co., proprietor of the Lancaster County Vaccine Farms, Marietta, Penna. and Omaha, Nebraska, U.S.A. The largest establishment in the world for the production of vaccine. Philadelphia : Craig, Finley & Co., 1885 Advertisement containing views depicting "The Western Establishment" and "Eastern Establishment," insets of the "Interior of Western Establishment," "Main Offices, Marietta" "Main Operating Room," and "The Stables," as well as pictorial details promoting the work and facilities of the Vaccine Farms