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A STUDY OF LIGHT SIGNALS IN AVIATION AND NAVIGATION
1.F. Benford, Gen. Elec. Rev. 29, 873 (1926).
2.These values have been calculated from data given in Russell, Dugan and Stewart’s book, Astronomy, Vol. 2, pp. 613, 625, 626, Ginn and Co. (1927). The value of H for starlight is based upon the statement that Rhijn found that the total light of the sky on a clear dark night is 6 times the light from all the stars and that the latter is equivalent to that of 1440 stars of the first magnitude. Thus the brightness H corresponds to that produced by 2160 first magnitude stars at the zenith.
3.A. Blondel and J. Rey, Jour. de Physique et le Radium 1, 530–51 (1911).
4.H. N. Russell, Astrophys. J. 45, 60 (1917).
5.R. A. Houstoun, Phil. Mag. 10, 416–432 (1930). See especially p. 420.
6.See article on Fog Penetration, by L. H. Anderson, U.S. Air Services, July 1931, p. 20–25. This is to appear in Trans. Amer. Soc. Mech. Eng.; Section on Aeronautical Engineering.
7.See Jeans, Dynamical Theory of Gases.
8.E. Madelung, Phys. Zeits. 19, 524–532 (1918).
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