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It is foreign to our intention to augment the number of pages in this treatise by preliminary observations, we shall therefore mention briefly the design of its publication. Having been for a few years past engaged in teaching the science of Mathematics, and more recently on an abbreviated method, by cancellation, and perceiving that the minds of all were not sufficiently capacious to understand the more intricate and complicated parts of that interesting and useful science, which tends to discipline, invigorate and enlarge the powers of the mind, and wishing to facilitate and render more comprehensive its elucidation, and believing that a collection of propositions under the various rules used in mercantile transactions with suitable explanation, bound in a compendious form, which could be perused at pleasure, would to dispel from the mind those clouds of obscurity and uncertainty, and thereby greatly enhance its intrinsic value, we therefore devoted the few leisure moments we had to its compilation, and deem the reasons we have mentioned a sufficient apology for its presentation, to the citizens of an enlightened republic.
Livre de Lyon
Captain Cook, new system of mathematics, mathematics sciences, arithmetic, Currencies, Division of Fractions, Multiplication of Fractions
Porter, James H., "Porter's New System of Mathematics: With the Addition of a Complete Ready Reckoner, for the Use of Farmers and Mechanics" (2020). Science and Mathematical Science. 17.