By combining this relation with equation (1) and remembering the equality of N, and Ne, we obtain (2 + x) (1 + x)-'= (m/m) X e2/(h c).
(7)The empirical value of the right-hand side is 2.13 and the solution of equation (7) is a value of x slightly above unity. It would just be equal to one if we could put the right-hand side of equation (7) equal to 2.12, thus diminishing its empirical value by half a per cent.Thus, if the equations derived by Eddington and by Sitte and Glaser hold, we arrive at the conclusion that in the state of equilibrium the number of neutrons nearly equals the number of protons. On the other hand, a relation, first pointed out by the author,4 which connects purely atomic constants and which is fulfilled to within an error of about half a per cent, i.e., mp/mX e2/(h c) = 3/ V (8) may be derived from the formulae of Eddington and Sitte and Glaser by assuming the equality of the numbers of neutrons and protons in the equilibrium state. ' A. S. Eddington, Proc. Roy.It has become a more or less accepted commonplace that environmental differences, although having a demonstrable influence upon individual differences in IQ, are less potent than natural differences under the conditions ordinarily met in our urban culture. No wholly satisfactory quantitative estimate of the relative r6les of nature and nurture has yet been possible, but various estimates agree in placing the contribution of nurture under per cent, and probably considerably under. (See references 1 to 5.)* 276 PROC. N. A. S.
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