Johnson, Gaylord · New York, The Macmillan company · leaf 133
118 THE SKY MOVIES Next morning they made a print from the nega-tive and it looked hke this: … You see the stars of the dipper made long circulartrails, while the pole star remained almost still at thecentre of all the curves. Since the picture was ex-posed for only an hour the curves were only one-twenty-fourth of complete circles, as the earth hadturned for only one of the twenty-four…
Astronomy
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