"The two thousand industrial site maps in the Manufacturers Mutual Fire Insurance Company Industrial Site Maps Collection, 1894-1954, chronicle sixty years of North American industrial development. Representing industrial sites in thirty-five states, the District of Columbia, and three Canadian provinces, these maps provide valuable information on site selection, power sources, building construction, and space allocation of major corporations, such as General Foods Corporation, International Paper Company, and Ford Motor Company, as well as many lesser-known firms."
Judith E. Endelman [preface] Guide to The Manufacturers Mutual fire Insurance Company Industrial Site Maps, 1894-1954, p.ix
The General Surveys are site surveys of many of the industrial sites in the greater Philadelphia metro area. They date from 1866 through 1896.