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ISBN13: 9780156007535
Turning in the direction of the scream
ISBN13: 9781074081676
and spend time in natural settings
Making Your Own Telescope Michael Hacker ISBN13: 9780156007535Complete, detailed instructions and numerous diagrams for constructing a do it yourself telescope. No complicated mathematics are involved, and no prior knowledge of optics or astronomy is needed to follow the text's step by step directions. Contents cover, among other topics, materials and equipment; tube parts and alignment; eyepieces, and related problems; setting circles; and optical principles. 6 plates. 100 figures. Author: Allyn J. Thompson,
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