Armour's electric trolley /. 19th century, Library of Congress collection

From Maguire & Baucus catalogue: Shows the private electric railway of Messrs. Armour & Co. in their great Chicago yards.
Part of the "Erie Railroad Series" (Edison films catalog): The following subjects present novel and interesting views along the line of the Erie, such as do not always come within the observation of the general tourist. We are indebted to the courtesy of the Erie officials, whose kind co-operation in affording us every facility within their power has enabled us to procure these unusual and effective pictures. (p. 23)