Many of the questions both in morals and politics seem to be of the nature of the problems de maximis and minimis in Fluxions; in which there is always a point where a certain effect is the greatest, while on either side of this point it gradually diminishes.
"Observations on the Effects of the Corn Laws, and of a Rise or Fall in the Price of Corn on the Agriculture and General Wealth of the Country"
Thomas Malthus
Jeremiah Collier wrote a short View of the Stage, which sold wonderfully, and immediately the Booksellers hir'd him to write Three Histories in Folio: And I question not but, because Sir Isaac Newton has outdone all Philosophers in his Treatise of Fluxions, they would employ him in Heroick Poetry, if he were young enough, and would be employ'd by them.
"An Essay on Criticism"
John Oldmixon
At the moment Jacob was speaking, certainly my fancy was bent on a phaeton and horses, rather than on Hebrew or Fluxions, and the contrast was striking, between what he conceived my first objects at Cambridge would be, and what they really were.
"Tales & Novels, Vol. IX [Contents: Harrington; Thoughts on Bores; Ormond]"
Maria Edgeworth