enotes a method of computation, so called from the calculi, or counters, anciently used for this purpose. Hence,

Calculus specialis, or literalis, is the same with algebra. See Algebra.

Calculus differentialis is a method of differencing quantities, that is, of finding an infinitely small quantity, which being taken an infinite number of times, shall be equal to a given quantity. See Fluxions.

Calculus exponentialis, among mathematicians, a method of differencing exponential quantities, and summing up the differentials of exponential quantities. See Fluxions.

Calculus integralis, or summatorius, is a method of summing up differential quantities; that is, from a differential quantity given, to find the quantity from whose differencing the given differential results. See Fluxions.