![](https://coimages.sciencemuseumgroup.org.uk/423/789/medium_thumbnail_1994_8772__0004_.jpg)
Alexander Bain's telegraph instrument
- Made:
- 1846
Railway telegraph instrument, in rectangular case for wall-mounting with sprung push-pull handles, by Alexander Bain, one of a pair installed at each end of Shildon Tunnel, Stockton & Darlington Railway, 1846.