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1. 

   First Glances at New Books

   By Science NewsApril 6, 1929

2. 

   Nature Ramblings: Beaver Ways

   By Science NewsApril 6, 1929

3. 

   Classics of Science: Malthus on Population

   By Science NewsApril 6, 1929

4. 

   Front Matter

   By Science NewsMarch 30, 1929

5. 

   3,400,000,000 Years Young

   By Science NewsMarch 30, 1929

6. 

   America a Melting Pot for Animal Stocks

   By Science NewsMarch 30, 1929

7. 

   Foolproof Matches and Cigarettes

   By Science NewsMarch 30, 1929

8. 

   Health Field Open

   By Science NewsMarch 30, 1929

9. 

   Airplanes Noisy If Engines Muffled

   By Science NewsMarch 30, 1929

10. 

    The Scientist’s Jig-Saw Puzzle

    By Science NewsMarch 30, 1929

11. 

    Separated Twins Become Unlike

    By Science NewsMarch 30, 1929

12. 

    Watch for Ice Started

    By Science NewsMarch 30, 1929