Grieves, Loren C. (Loren Chester), b. 1878 · Washington, United States Infantry Association · leaf 28
pegs mentioned. A straight linejoining this middle point and the peg under the weight willbe in the true meridian. Place a pole about a hundredyards in prolongation of this line, and with the compasssight back on the tip of the inclined pole, and the declina-tion will be obtained. Orientation,… … Fig. 4 on the dial, determine a point on it midway between thehour hand and twelve oclock. A line through this pointand the pivot of the hands will be approximately in thetrue meridian. (See Fig. 5.) The operation of pointing the hour hand directly underthe sun is made^easy by easting^the_shadow of…
Maps, Military · Military topography
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
