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 67
ntal.Bring the telescope directly over and in line with the two levelingscrews between the plates and opposite each other. As you standfacing the instrument turn the thumb of the left hand in the di-rection of the motion of the bubble and turn both thumb screwstowards or away from each other, being…
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
