The Value of e/m

Abstract

EDDINGTON1 originally proposed the relation hc/2e2 = 136, and later2 revised this to 137. Still later he proposed3 a second relation, namely, the ratio of M, the mass of the proton, to m, the mass of the electron, is 1847.64. This second relation, combined with the value of the Faraday and Aston's mass of O16 leads4 to e/m = (1.77031 ± 0.00014) × 107 E.M. units. If, finally, one assumes the correctness of Bohr's formula for the Rydberg constant, there results4, h = (6.5490 ± 0.0011) × 1027 erg. sec., e = (4.775855 ± 0.000048) × 1010 E.S. units.

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References

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    A. S. Eddington, Proc. Roy. Soc., A, 122, 358; 1929.

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    A. S. Eddington, Proc. Roy. Soc., A, 126, 696; 1930.

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    A. S. Eddington, Proc. Roy. Soc., A, 134, 524; 1931.

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    G. G. Kretschmar, Phys. Rev., 43, 417; 1933. See also H. R. Robinson, J. P. Andrews and E. J. Irons, Proc. Roy. Soc., A, 143, 48; 1933.

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    See E. T. Bell "Numerology", reviewed in NATURE, 133, 80; Jan. 20, 1934.

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