New York [etc.] Simmons-Boardman Pub. Co. [etc.] · leaf 41
nsof the ratchet and gear shown, a rotary and also aslow longitudinal movement to the drum carryingthe zinc plate. Another marking point, s, actuatedby a rod leading to the footplate, serves to mark byhand on the zinc plate tbe time of passing each kilo-meter post. After their removal from the drum…
Railroads · Railroad cars
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
