Surveying ; a manual of practical instruction in the art of plane surveying, including plotting, leveling, triangulation, line running, cross-sectioning, traversing, and other details of field work (1910)
American School of Correspondence, Phillips, Alfred Edward, 1863- [from old catalog] · Chicago, American school of correspondence · leaf 186
t reduction in the number of contacts, as the tapes are aboutthree hundred feet long as compared with bars of about twelve feet. 2. Comparatively small cost because of the few per.sons reiiuired. 3. Shortness of the time employed, an hour to a mile being an ordinaryrecord in actual measurement 4.… … Fig. 1-20. Steel tapes offer a means of measuring base lines wliicli issuperior to that obtained by measuring bars, because they combinethe advantages of great length and simplicity of manipulation,with the precision of the shorter laboratory standards, providingonly that means be perfected for…
Surveying
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