[Illustration: The Klepalo.]



CHAPTER VII.

SURVEYING.

One of the first things we did after getting fairly settled in our new
quarters was to make a complete survey of Willow Clump Island and its
immediate surroundings. Our surveying instruments were made as follows:



The Surveying Instrument.

[Illustration: Fig. 71. Baseboard of the Surveying Instrument.]

[Illustration: Fig. 72. Sighting Blocks on the Baseboard.]

Out of a 1-inch board we cut a base 15 inches long and 4 inches wide. In
the center we sawed out a circular opening of about 3 inches diameter and
covered this at the bottom by a circular piece 1 inch thick and 5 inches
in diameter, thus forming a socket in which our compass fitted snugly. A
hole 1 inch in diameter was drilled through the center of this circular
piece to receive the pivot pin of a tripod. Across each end of the
baseboard we secured a block 4 inches long, 2 inches wide and 1 inch
thick. A 1-inch sight hole was drilled through each block at its center. A
ring of cardboard, on which Uncle Ed marked with radial lines the 360