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## TO SET OUT A RIGHT ANGLE WITH A TAPE

Measure 40 ft. on the line to which you wish to run at right angles,
and put pegs at A and B; then, with the end of the tape held carefully
at A, take 80 ft., and have the 80 ft. mark held at B. Take the 50 ft.
mark and pull from A and B until the tape lies straight and even, you
will then have the point C perpendicular to AB. Continue straight
lines by sighting over two sticks in the well-known way.

/Another method/.--Stick a pin in each corner of a square board, and
look diagonally across them, first in the direction of the line to
which you wish to run at right angles, and then for the new line sight
across the other two pins.

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