206 Woodcraft Birch Bark Roll
foot of the tree. The height of the tree will be found by the
formula: the distance between the peg and the pole is to the
height of the pole as 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 a knot on the tree which may be
easily climbed to. See inside line.
C7
58 &k
To Measure Distance Across a Stream
Drive a stake at H. 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
Tattle Aemlock.
D>
at A, B, C, sighting the line A B for the spot at D, and put
three pegs 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 EG with D. Now AG.

# Stránka:roll 1931.djvu/222

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