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 157
theimage of the object that is seenthrough it, yet it aids the nakedeye when you are looking at theSun and Stars. To make a pinhole telescope geta pasteboard tube about 1*4 inchesin diameter and 5 or 6 inches long.A paper tube for mailing papersand sheet music is just the thingand can be bought at… … Fig. 149.—Disk of Card-board for Pinhole Tele-scope. \SSS///// s CARDBOARD TUBE IV/V/V/Vy/V/V/V////// / /./ ,,,,,?}>>>>}>>>,>}>>}> 1 ?*r>/ ^ CARDBOARD TUBE
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
