Gompertz was an old-fashioned Newtonian who retained and defended the notation of fluxions. Method of Fluxions is a book by Isaac Newton. But then these finite Exponents are found by the help of Fluxions. Isaac Newton referred to them as fluxions. Fluxions and fluents made up Newton's early calculus. Arithmetic, geometry, and calculus ("fluxions") gave some practical application in navigation and surveying. Newton called his calculus "the science of fluxions". Newton's name for it was "the science of fluents and fluxions". "Method of Fluxions" was a book written by Isaac Newton. Cotes's additional works were later published in Thomas Simpson's "The Doctrine and Application of Fluxions". He believed this put fluxions back on safe ground. "Fluxionum methodus inversa" (The Inverse Method of Fluxions), but apparently he turned down the offer.