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Published online by Cambridge University Press: 18 August 2016
Though between the graphic method on the one hand, and Mr. Higham's on the other, the formula used by Mr. Woolhouse in graduating the Institute Tables seems to have lost something of its pre-eminence, it may be convenient to have on record a general expression for it, correct to third differences, derived as on pages 341 and 350 of the twenty-third volume of the Journal.