Scouting for girls; official handbook of the Girl scouts (1920)
Girl Scouts of the United States of America · New York, N.Y., The Girl scouts, Inc · leaf 494
470 SCOUTING FOR GIRLS A tower, to a point some distance from the tree, and plant a pole or stake say 5 feet high B ; continue pacing the straight line to the point where, lying down with eyes level with the tree base, the top of the tree can be seen on a line with the top of the pole ; plant here… … There are other ways of determining height. As shown in diagram c, place a mirror (M) horizontally on the ground reflector side up, some distance from the base of the object to be measured, in this case a tent. Walk backward from the mirror in a straight line until the top of the tent pole can be…
Girl Scouts of the United States of America -- Handbooks, manuals, etc · Girl Scouts -- Handbooks, manuals, etc
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
