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 208
Fig. 182.—Boy Looking throughPrism at Slit in Cardboard. j 190 THE BOOK OF THE STARS When you look at the sunlight streaming in through the slitin the cardboard you will see a number of dark lines separatingthe different colors. These dark lines are called Fraunhoferslines, because Fraunhofer, who…
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
