The new automatic railroad signal system
Subtitle: an important invention to save life and property : gravity and common air utilized to prevent railroad accidents, save a great loss of life and an immense amount of property ... invented by J.S. McLeod of Boston, and manufactured by the McLeod Railroad Air Signal Company ...
Publisher: McLeod Railroad Air Signal Co.
Published: 1885
Place of publication: Boston
Language: eng
Number of pages: 16