Stony; gritty; hard like stone; as a calculous concretion.

In mathematics; Differential calculus, is the arithmetic of the infinitely small differences of variable quantities; the method of differencing quantities, or of finding an infinitely small quantity, which, being taken infinite times, shall be equal to a given quantity. This coincides with the doctrine of fluxions.

Exponential calculus, is a method of differencing exponential quantities; or of finding and summing up the differentials or moments of exponential quantities; or at least of bringing them to geometrical constructions.

Integral calculus, is a method of integrating or summing u moments or differential quantities; the inverse of the differential calculus.

Literal calculus, is specious arithmetic or algebra.