[Milk wagon crossing railroad tracks.]
[Portrait of William Davis Hassler with hat.]
International Signal Corp., Exterior, Erie Train Running on Safety Ramp.
[Harlem River, NY.]
[House.]
International Signal Corp., Exterior, View Looking Across Track Showing Safety Ramp.
[Elevated Railroad.]
[Train tracks.]
[Men working on elevated train tracks.]
[Elevated train tracks.]
[Group of men on elevated train tracks.]
[Group of men on the elevated train tracks.]
Race Tracks, Belmont Park.
[View of elevated train tracks.]
[El train tracks.]
[White Plains Road North at Gun Hill Road.]
Permanent Railway Tie Corp., Lackawanna R.R. Installation at Secaucus N.J.