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V1 Some Surveying Problems 393
V11 Some Special Office 1nstruments
14 other sections not shown
adjustment alidade altitude axis azimuth base line bearing boundary bubble chain clamp colatitude compass computed contour contour lines corners correct curve declination determined direction distance division dumpy level east elevation equation eyepiece feet field figure given graduated Gunter's chain horizontal inches instrument intersection known land latitude latitude and longitude LCot length line of sight located logarithm longitude difference LSin LTan marked measured ment meridian method miles minutes monuments motion moved needle notes observed offsets parallel perpendicular plane plane table plate plotted plumb line Polaris position precision principal meridian protractor raymond's surv rule scale screws shown in Fig side slide square stadia stake station surface survey surveyor tangent tape telescope tion township transit traverse triangle tube velocity vernier vertical angle vertical circle wire zero