The improvements referred to in this circular are in use upon this railway, and considered valuable, and are worked under the following regulations ...
Contributors: Great Western Railway Company (Canada)
Publisher: [s.n.]
Published: 1872
Place of publication: Hamilton, Ont
Language: eng
Subjects: Signal lights; Locomotives; Headlights; Feux de signalisation
Other titles: Improvement in signal lights for locomotives
Notes: Incipit title.

Signed: Andrew Dick.

Dated: Hamilton, Ontario, October, 1872.

At head of title: Great Western Railway.

Caption title (p. [3]): Improvement in signal lights for locomotives.

"Specification forming part of letters patent no. 129,797, dated 23rd July, 1872"--P. [3].