123. MEASURING TREES
I have been asked for a method of measuring the height of trees. Cut a piece of cardboard or stiff paper into a triangle having one angle of ninety and two of forty-five degrees. Now make a mark on the tree trunk at tho height of your eye from the ground, arid step backwards, holding the bit of card on edge, so that the angle of ninety degrees will be on the lower side and towards the tree. Place the eye to the point of the nearest angle of fortyfive, sighting along the lower edge of the triangle at the mark on the tree. Continue to step back until the upper side of the triangle is in a line with the top of the tree. Then the distance that you are from the tree trunk, plus the height of the mark you made on the bark from the ground, will be the height of the tree; and on fairly level ground this measurement will prove sufficiently accurate. ..
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Press, Volume L, Issue 149814, 30 May 1914, Page 16
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170123. MEASURING TREES Press, Volume L, Issue 149814, 30 May 1914, Page 16
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