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Published online by Cambridge University Press: 07 November 2014
page 241 note * Since the integrand the definite intergal is tabulated in two parts exculding x=0; vz. Ei(x)=and the latter is always -ve and →0 as x→∞.
page 242 note † The meaning of the double signs ± and ∓ is, as usual, that the upper sign is to be used throughout in one case, and the lower sign throughout in the other case.