costs 80 cents. A good plan is to mark the circle on bristol board [1]
which can be tacked in the board. Then a pointed piece of wood ten inches
long should be fastened with a nail in the center of the circle. At the
ends of the pointer pins should be placed vertically so that they are in
line with the pivot nail. This will form a sight for measuring the angles.
The board is then mounted upon a pointed stick or tripod. You will need a
hatchet and a half dozen sharpened sticks for markers and a boy for rod
man. You are now ready for the survey.

[Transcribers Footnote 1: Smooth, heavy pasteboard.]

[Illustration: Fig. 1. Top View of Transit, Protractor, Sighting Pins,
Board for Circle, Support]

Camp Survey

To make a map of the location of the camp, the first thing is to locate a
base line on a level piece of ground. At the two ends A and B stakes are
placed and the length carefully measured with the tape. Then from one end
of the line stretch a string about ten feet long, toward the other stake.
Under this string place the compass. In this way the direction of the line
may be learned.

In figure 1, the base line runs about 10 degrees west of north. Drive a
stake where the tent is to be located. This place will be called C. Then
place the transit at A and measure the angle formed by the imaginary lines
AC and AB. In the example the angle is about 45 degrees. Then place the
transit at B and measure the angle there, formed by the lines AB and BC.
Then the angle at C should be measured and the sum of the angles thus
measured will be 180 degrees, if the work is correct.