The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts (1915)
Collins, A. Frederick (Archie Frederick), 1869- · New York, D. Appleton and company · leaf 63
Fig. 46.—Tin Ring for Sundial. exactly through the center of the tin ring. Now screw thebrass semi-circle to a baseboard (see Fig. 48), so that theangle made by the wire and the surface of the board will beequal to the latitude of the place where it is to be used; in otherwords, when the board is… … Fig. 47.—Brass Semi-Circle with Shadow Wire.
Astronomy · Stars
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