Merriman, Mansfield, 1848-1925 · New York Wiley · leaf 208
moving in a lateral direction soas to describe an ellipse. To lessen this effect, and also forprotection against wind, it is often screened by a canvascovering placed around the upper part of the scaffold. The views of two triangulation stations of the U. S. Coastand Geodetic Survey here given may…
Geodesy · Surveying
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
