Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 327
TELPHERAGE. 307 … Fig. 3.__Supporting Pole, Double Line. One of the simplesttmeth- ods of pole construction for double lines. Especially recommended for long lines^and where trees are available. SINGLE LINC » s c 0 E f « H 1 k- 1 ; SINGLE LINE Fig. 4. Other Forms of Pole Construction, Showing Single and Double…
Engineering
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