Surveying and Levelling Instruments, Theoretically and Practically Described. For construction, qualities, selection, preservation, adjustments, and uses; with other apparatus and appliances used by civil engineers and surveyors in the field.

CHAPTER XV.

Chapter 1530 wordsPublic domain

GRAPHIC SURVEYING INSTRUMENTS AND APPLIANCES CONNECTED THEREWITH:--Plane Tables--Alidades--Telescopic Arrangements-- Subtense Measurements--Various Devices for Holding the Paper-- Continuous Papers--Adjustment of Tripod Heads--Method of Using--Edgeworth's Stadiometer--Sketching Protractor--Sketching Case--Camera Lucida, etc. 472