Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 66
45 the proper angle. The board should be about 12 inches squareand 1 inch thick. Since the shadow of the wire made by the sunlight will fallon XII at noon, it will be plain that the shadow of the wire fall-ing on the numbers on one side or the other of the ringwill mark the Sun time. To change Sun… … Pig. 49.—To Find the North by a Watch. if the Sun is shining. The watch should be held face up-ward ; then turn the watch around until the hour hand points inthe direction of the Sun. Draw an imaginary line from thehour XII to the center of your watch. If, now, in the middle between this line and…
Astronomy · Stars
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