[Milk wagon crossing railroad tracks.]
[Portrait of William Davis Hassler with hat.]
International Signal Corp., Exterior, Erie Train Running on Safety Ramp.
[Portrait of William Davis Hassler.]
[Harlem River, NY.]
International Signal Corp., Exterior, View Looking Across Track Showing Safety Ramp.
[Men standing on dock near ship.]
[House.]
[Train tracks.]
[Elevated Railroad.]
[Men digging near Morris Park Office.]
[Men working on elevated train tracks.]
[Elevated train tracks.]
[Group of men on elevated train tracks.]