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 96
of magnetic force. How to Make a Simple Com-pass.—Take a piece of watch spring about 3 inches long and straighten it. Heat the middle red-hot and let it cool slowly, when the temper will be taken out of it at this point. Place a center punch in the middle of the spring and strike it a sharp blow… … CORK Fig. Com- 78 THE BOOK OF THE STARS
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
