The films were taken from April 18, 1904 to May 16, 1904 in Pittsburgh, Pennsylvania, and document various Westinghouse manufacturing plants. They were made by G. W. Bitzer of the American Mutoscope and Biograph Company, were shown at the Westinghouse Auditorium at the 1904 St. Louis World's Fair, and may have been made for that purpose.Although I do not fully know what Westinghouse is (or more accurately was), and know very little about Pittsburgh, this is a pretty cool document of history. We see not only the laborers (some working in dangerous conditions), but also an endless stream of well-dressed female employees. And I do mean endless.In an age where manufacturing seems more and more rare, this is an interesting look back at America's history of building things.