Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 328
POLES AND BRACKETS WITH SINGLEARM FOR SINGLE OR DOUBLE TRACK INSULATORS FEEDERS FOR USE IN CITIES WITH DOUBLEARM FOR DOUBLE TRACK … ARM OF POLE ADJUSTED FOR DOUBLE TRACK ^TROLLEYS TROLLEY WIRE SUSPENSION CURVESSINGLE TRACK DOUBLE TRACK -TROLLEYI) 11^ POLE
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
