Scope and Contents This collection consists of a letter written, in French, by Colin Maclaurin, to Jean-Jacques d’Ortous de Mairan, Perpetual Secretary of the French Académie des Sciences. Maclaurin first discusses his major work, the Treatise of Fluxions (1742), a rigorous and systematic defence of Newtonian calculus. Maclaurin acknowledges that foreign readers might be surprised by his methodology but explains that he wished to meet potential scientific and philosophical...