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Published online by Cambridge University Press: 18 August 2016
page 25 note * The proof of the general truth of this rule is very easily deduced from the formula:
page 25 note † For its construction see the ingenious treatise “Die Thomas'sche Rechen-maschine, von F. Reuleaux, Freiberg 1862.”
page 26 note * We have taken the liberty of transferring Dr. Zillmer's formulæ into the notation commonly used in this country. He writes the above formula thus
R(x) being the annuity-due = 1 + ax or =ax,—ED. J. I. A.
page 27 note * Here