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 198
se lines,and draw another line along its edge. If these two lines coincide,the ruler is straitrht. PLANE SirKVEYrNC4 m 2nd. To maJie the jilaiic of the tahle horizontal when thehubhles are in the center of the tiihea. Assuming the table to beplane, set the alidade in the middle of the table, level… … Fifr. 124«. do not, correct one-half of the error l)y means of the levelingscrews and the remainder by means of the capstan-headed screwsof the level tubes. Repeat the operation until the bubbles remainin the center of the tubes in both positions of the alidade. 3rd. To inalie the line of…
Surveying
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