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1. 

   January 20, 1923

   By Science NewsJanuary 20, 1923

2. 

   January 13, 1923

   By Science NewsJanuary 13, 1923

3. 

   January 6, 1923

   By Science NewsJanuary 6, 1923

4. 

   December 30, 1922

   By Science NewsDecember 30, 1922

5. 

   December 23, 1922

   By Science NewsDecember 23, 1922

6. 

   December 16, 1922

   By Science NewsDecember 16, 1922

7. 

   December 9, 1922

   By Science NewsDecember 9, 1922

8. 

   December 2, 1922

   By Science NewsDecember 2, 1922

9. 

   November 25, 1922

   By Science NewsNovember 25, 1922

10. 

    November 18, 1922

    By Science NewsNovember 18, 1922

11. 

    November 11, 1922

    By Science NewsNovember 11, 1922

12. 

    November 4, 1922

    By Science NewsNovember 4, 1922