Author:

Tyer & Company  Search this

Physical description:

96 p., [5] folded leaves of plates : ill., forms ; 19 cm

Type:

Books

Date:

1874

[1874?]

Notes:

On cover: Fifth edition. Tyer's block telegraph and electric locking signals.

Printer and place of publication from colophon.

Preface to the fifth edition dated March, 1874.

Plates, bound after p. 96, are numbered p. 97-101.

Topic:

Railroads--Signaling--Block system  Search this

Call number:

TF630 .T97 1874

TF630.T97 1874

Data Source:

Smithsonian Libraries

EDAN-URL:

edanmdm:siris_sil_379146