Geodesic Leveling Instrument, The Davidson Meridian Instrument, Target and Leveling Rod for Geodesic Leveling Instrument, U.S. Coast and Geodetic Survey, Report of 1879

Very nice plates from the U.S. Coast and Geodetic Survey report showing antique surveying equipment. Set of 3 plates. The Target and Leveling Rod plate is slightly larger at 13 X 11.25 inches.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.