Johnson, Gaylord · New York, The Macmillan company · leaf 115
oop until the cord stretched upon it pointed in thesame direction the magnetic needle did. Then,while Betty held the hoop motionless, Uncle Henrycut away the big quarter circle he had drawn on thepaper until only a V-shaped piece was left. Theangle at the point of it was an angle of just…
Astronomy
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