by Association of Edison Illuminating Companies

1900

by Association of Edison Illuminating Companies. Committee on St. Louis exposition

1904

by National Electric Light Association

1929

by National Electric Light Association. Convention

1930

by National Electric Light Association

1904

by National Electric Light Association, National Electric Light Association. Convention

1928

by National Electric Light Association

1928

by National Electric Light Association

1904

by National Electric Light Association

1930

by National Electric Light Association

1923

by National Electric Light Association. Convention

1930

by International Association of Electrical Inspectors

1929