Feature

  1. “Forcible Feeding” of Wheat

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  2. Father of G. E. Research

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  3. Classics of Science: Induction of Electric Currents

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  4. Mercury Has 2112-Hour Day

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  5. Cold Increases Immunity

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  6. Heligoland Now Bird Refuge

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  7. Building and Flying Model Airplanes: Making the Propellers of SS-2

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  8. Light’s Speed Decreasing?

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  9. Vitamin B in Lactation

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  10. Front Matter

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  11. New Color Test for Toxins

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  12. The Struggle for Death

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