A System of Train-Signalling, by Which Also Disabled Trains May Telegraph for Assistance without the Aid of Portable Apparatus. [Abstract]

✍ Scribed by Charles V. Walker

• Book ID: 123746521
• Publisher: The Royal Society
• Year: 1856-1857
• Weight: 350 KB
• Volume: 8
• Category: Article
• ISSN: 0365-0855
• DOI: 10.2307/111379