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1. 

   Fleas Can Probably Transmit Typhus Fever, Scientists Say

   By Science NewsFebruary 21, 1931

2. 

   Foggiest Spot of U. S. A. Brightened up in 1930

   By Science NewsFebruary 21, 1931

3. 

   Round Temple Is Rare Find in Aztec Ruins

   By Science NewsFebruary 21, 1931

4. 

   More Americans Killed by Autos than by World War

   By Science NewsFebruary 21, 1931

5. 

   Everglades Park Bill Now on House Calendar

   By Science NewsFebruary 21, 1931

6. 

   Criminals Who Will Repeat Detected by Simple Test

   By Science NewsFebruary 21, 1931

7. 

   Seeds of Rubber Tree Yield Valuable Oil

   By Science NewsFebruary 21, 1931

8. 

   [Photograph]: Where Conversation Begins to Jump the Oceans

   By Science NewsFebruary 21, 1931

9. 

   Gulf Stream Writes Own Temperature Record

   By Science NewsFebruary 21, 1931

10. 

    Source of Half World’s Gold Output Nearing Exhaustion

    By Science NewsFebruary 21, 1931

11. 

    Molecules Rebound Safely from White-Hot Surface

    By Science NewsFebruary 21, 1931

12. 

    New Scale Invented for Measuring Snow

    By Science NewsFebruary 21, 1931