Feature

  1. Swedish Stone Age City

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  2. Twisters over Average

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  3. 155,000,000-Year-Old Plants

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  4. The Significance of “Gestalt”

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  5. Million Watt Broadcasting Station

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  6. Colorado Sun Effective

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  7. Now Tinted Film for Talkies

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  8. Radium Effects Not Due to Cosmic Rays

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  9. Radio Stations Must Keep Frequency

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  10. New Visual Phenomenon

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  11. The Prehistory of Radio

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  12. American Ape Reported

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