Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 806
spar is inserted, so that atelescopic adjustment is afforded,thus giving a long boom suitable toraising different lengths of poles. By this means poles 70 feet inlength are easily handled. On the front end of the wagon ismounted a hand-operated hoisting winch for adjusting the gu)sleading to the… … FIG. 558.—POLE RAISED. when derrick wagons are used, but this is not thought to be econom-ical, for the presence of horses is needed in any event to draw thewagon to the place of work and from pole to pole thereafter. Withthe wagon shown it is not necessary for the team to be hitched tothe wagon…
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