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  Contents   
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Table 8  1. Figure of the Earth’s surface  104 
  2. Gravity at the surface; mass, mean density, moment of inertia  104 
  3. Pressure, density, acceleration of gravity and ellipticity of layers of equal density in the Earth  105 
  4. The Earth’s core  106 
  Contents   
    Page 
Table 8  1. Figure of the Earth’s surface  104 
  2. Gravity at the surface; mass, mean density, moment of inertia  104 
  3. Pressure, density, acceleration of gravity and ellipticity of layers of equal density in the Earth  105 
  4. The Earth’s core  106 

1. Benfield, Z. f. Geophys. 13, 157, 1937.

2. Birch, Bull. Seism. Soc. Amer. 29, 463, 1939.

3. Bullen, M. N. R. A. S. Geophys. Supp. 3, 395, 1936.

4. Bullen, Trans. Roy. Soc. New Zealand, 67, 122, 1937.

5. Bullen, idem, 69, 188, 1939.

6. Bullen, Bull. Seism. Soc. Amer. 30, 235, 1940.

7. Gutenberg and Richter, Beitr. z. Geophys. 54, 94, 1939.

8. Gutenberg and Richter, M. N. R. A. S. Geophys. Supp. 4, 363, 1938.

9. Jeffreys, M. N. R. A. S. Geophys. Supp. 4, 537, 548 and 594, 1939.

10. Lambert, The Internal Constitution of the Earth, Chap. 13, McGraw-Hill, New York, 1939.

11. Olczak, Acta Astron. 3, 81, 1938.

12. Williamson and Adams, J. Washington Acad. Sci. 13, 413, 1923.

Table 8–1.—Figure of the Earth’s Surface

(Ref. 10)

Semi-axes of International Ellipsoid of Reference (1924):
  • Equatorial, a = 6378.388 km.

  • Polar, c = 6356.912 km.

 
Radius of sphere of equal volume, α0 = 6371 km. 
Ellipticity of surface, (ac)/a = 1/297 = 0.00337. (For ellipticity of internal levels, see Table 8–3.) 
Quadrant of a meridian = 10,002.288 km. 
Quadrant of the equator = 10,019.148 km. 
Area of surface = 5.101 × 1018 cm.2  
Volume = 1.0832  
Semi-axes of International Ellipsoid of Reference (1924):
  • Equatorial, a = 6378.388 km.

  • Polar, c = 6356.912 km.

 
Radius of sphere of equal volume, α0 = 6371 km. 
Ellipticity of surface, (ac)/a = 1/297 = 0.00337. (For ellipticity of internal levels, see Table 8–3.) 
Quadrant of a meridian = 10,002.288 km. 
Quadrant of the equator = 10,019.148 km. 
Area of surface = 5.101 × 1018 cm.2  
Volume = 1.0832  

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