Beans, E. W. [from old catalog] · Philadelphia, J. W. Moore · leaf 76
G at F, to make F Gat right angles with A Bprolonged. Bun F C G,measuring the distanceF G. Observe the an-gles B F G and F G B, the complements of whichare F B C and G B C. The sum of these comple-ments is F B G. As the angle F B G, in degrees or minutes, Is to the angle F B C in the same measure,… … 72 A MANUAL FOR SURVEYORS. run out where there is no local disturbance of theneedle by setting the instrument at F, and run F Gby this complementary course. The base F G ofthe triangle B F G should be of such a length, thatthe angle F B G may be only a few degrees; if itshould be too great, the…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
