Stránka:roll 1917.djvu/231

From thewoodcraft.org
Jump to navigation Jump to search
Tato stránka nebyla zkontrolována


“'1“ "J Things to Know and Do 199 the distance between 'the peg and the tree is to the height of the tree or BA: AC:: BE:X. This may be proved by selecting lin knot on the tree which may be easily climbed to. See inside e. ' / 0" C,a/ Jig-("IL”— To Measure the Distance Across a Stream Drive a stake at H.— 1 To measure distance from H to D cut three straight poles of exactly the same length and peg them together in a triangle. Place the triangle on the bank at A, B, C, sighting the line A B for the spot at D, and put three pegs . , " ""H " "-4 Inn-p"..- " in the ground exactly under the three pegs where the triangle is. Move the triangle to E F G and placing it so that F G should line with A C, and E G with D. Now A G D "knost must be an equilateral triangle; therefore, ach‘“ to arithmetic, the line D H must be seven eighths or A G, which (an of course be easily measured.