Abstract
FROM measurements of wave-lengths of X-ray lines with ruled grating and from the Bragg angles of reflections from crystals, it is possible to compute the magnitude of the electronic charge. The value thus obtained by Bearden1 and Bäcklin2 is 4·807 χ 10-10 E.S.U., which is considerably higher than Birge's3 best estimate of Millikan's oil drop value of electronic charge (4·770 ± 0·005) × 10-10 E.S.U. Millikan has in his own experiment4 assumed a value for the viscosity of air at 23° C. of (1822·6 ± 0·04 × 10-7 C.G.S. units, which is based only on the observations of Harrington5.
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References
Bearden, Phys. Rev., 37, 1210 (1931).
Bäcklin, Z. Phys., 93, 450 (1934).
Birge, Phys. Rev., Supp., 1, 1 (1929).
Millikan, Phil. Mag., 34 (1917).
Harrington, Phys. Rev., 8, 738 (1916).
Wagstaff, Phil. Mag., 45, 84 (1923).
Kellström, Phil. Mag., 23, 250 (1937).
Bond, Proc. Phys. Soc., 49, 206 (1937).
Rigden, NATURE, 141, 82 (Jan. 8, 1938).
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BANERJEA, G., PATTANAIK, B. Viscosity of Air and the Electronic Charge. Nature 141, 1016–1017 (1938). https://doi.org/10.1038/1411016c0
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DOI: https://doi.org/10.1038/1411016c0
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