Feature

  1. Answers to Test

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  2. Poison in Silver Polish

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  3. The Densest Star

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  4. Classic Inventions: Edison’s Electric Lamp

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  5. The Scientific Medical

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  6. Amateurs Watch for Meteors

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  7. Huge Sunspot Causes Magnetic Storms

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  8. Gorillas at Home

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  9. Infringement of Food

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  10. Classics of Science: The Discovery of Neptune

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  11. First Glances at New Books

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  12. Back Matter

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