Tyer's patent train signalling telegraphs.
By: [By] Tyer & company ...
Publisher: Printed by Alabaster & Passmore
Published: 1874
Place of publication: [London
Language: eng
Number of pages: 101
Subjects: Railroads -- Signaling -- Block system.
Other titles: Tyer's block telegraph and electric locking signals.; Block telegraph and electric locking signals.; Patent train signalling telegraphs.
Notes: On cover: Fifth edition. Tyer's block telegraph and electric locking signals.