“'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.

# Stránka:roll 1917.djvu/231

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