Johnson, Gaylord · New York, The Macmillan company · leaf 136
FIFTH REEL 121 The next picture is a photograph of the Yerkestelescope, the largest of its kind in the world. Itkeeps pointing at any star that the astronomerwants to look at, because it turns round on a slant-ing axis that is exactly parallel to the polar axis ofthe world. … 122 THE SKY MOVIES The camera that Uncle Henry propped up on the stump to take thepicture you have just seen—the stars around the pole—was a Kodakwith a rapid rectilinear lens. If you want to take a similar one, besure to open the iris-diaphragm of the lens as wide as it will go. Youwill not get a…
Astronomy
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