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1. 

   Bureau of Standards First in This Country to Liquefy Helium

   By Science NewsApril 18, 1931

2. 

   Stone Age Town Is Found in Delta of the Nile

   By Science NewsApril 18, 1931

3. 

   Discovery of Two New Essentials to Life Reported by Chemists

   By Science NewsApril 18, 1931

4. 

   Panamanian Bug Is Genuine Bugbear

   By Science NewsApril 18, 1931

5. 

   Dogs Get New Type of Training to Serve as Guides for Blind

   By Science NewsApril 18, 1931

6. 

   Reports 21-Year Experiment in Goitre Prevention

   By Science NewsApril 18, 1931

7. 

   All Flyers Began as Gliders

   By Science NewsApril 18, 1931

8. 

   In Science Fields

   By Science NewsApril 18, 1931

9. 

   [Photograph]: A Giant from the Indian Hills

   By Science NewsApril 18, 1931

10. 

    Nearest Outer Galaxy Found to Contain 214,000 Bright Stars

    By Science NewsApril 18, 1931

11. 

    Progress toward Control of Infantile Paralysis

    By Science NewsApril 18, 1931

12. 

    Origins of the Vine and the Fig Tree: “A Classic of Science”

    By Science NewsApril 18, 1931