Feature

  1. Coal Research Frees World

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  2. Color Snapshots for Amateur

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  3. 50,000,000 Indians in 1200 A. D.

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  4. Nature Ramblings: Earwig

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  5. Keeps Artificial Rubber Secret

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  6. New Knockless Fuel Promised

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  7. Quanta and Proton Fragments

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  8. Exploration Limited

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  9. Finds Year’s Third Comet

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  10. Classics of Science: Hydrogen: Inflammable Air

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  11. First Glances at New Books

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  12. Back Matter

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