[Trade Journal]
Publication: The Telegrapher
New York, NY, United States
vol. IV, no. 51, p. 407, col. 3
The Brooks Insulator.
THE Schuylkill Navigation Company are putting up a line of Telegraph with four (4) wires along the Schuylkill, from Philadelphia to the coal regions in Schuylkill County, to facilitate the coal trade. They use the Brooks Insulator.