During the war it-self, Gottfried Leibnitz of Leipzig had perfected the system of infinitesimalcalculus.
2
The logic of ideas is to that of syllogisms as the infinitesimalcalculus to common arithmetic; it proves, but at the same time supersedes.
3
He was always searching after subtleties; all his ideas were problems, and he carried the spirit of the infinitesimalcalculus into the management of business.