Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 455
Fig. 11. Single Suspension.For Wood Poles. Figures 15 and 16 illustrate simple forms of center-pole brackets. … Fig. 12. Single Suspension.For Wood Poles. Center-pole construction is quite often used on boulevards in cities wheretbe brackets and poles can be made quite ornamental.
Electrical engineering
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