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 58
+#\^:p::±^: rrrttrr^T … i! i i::: i i J. 1 rrrr nwpp Fig. 39.—Continental Morse Code. 40 THE BOOK OF THE STARS long flash a dash and short and long flashes represent letters.This is the same code that is used for wireless telegraphy. How to Make a Simple Heliograph.—A heliograph ismerely a mirror mounted on a baseboard,…
Astronomy · Stars
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