Floating derrick MONARCH at temporary draw bridge over Harlem River, New York, NY, circa 1898 gelatin silver print Merritt-Chapman & Scott Corporation circa 1898 1964.520.256 ViewFloating derrick MONARCH at temporary draw bridge over Harlem River, New York, NY, circa 1898 gelatin silver print Merritt-Chapman & Scott Corporation circa 1898 1964.520.258 View