Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 207
If 50 feet or 100 feet long and graduated to feet and 218 SURVEYING tenths of a foot, the tape is especially designed for city work.Other kinds are employed in bridge, road, or mining work, invery accurate measurements of base lines, or as standards ofcomparison for other instruments of… … Fig. The Surveyors Compass Note. The letters E and W on the face of the compass are reversedfrom their true positions. The reason for this is that if the sights areturned towards the west, the north end of the needle is turned towardsthe letter W, and if the north end of the needle is turned…
Trigonometry · Surveying · Navigation
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