a theorem or general rule or expression, for resolving certain particular cases of some problem, &c. So \(x + \frac{1}{2}d\) is a general formula for the greater of two quantities whose sum is \(x\) and difference \(d\); and \(x - \frac{1}{2}d\) is the formula, or general value, for

(a) By his successor in Monkwell-street, to whose sermon, preached on occasion of the Doctor's death, our readers are indebted for everything valuable in this short memoir. the less quantity. Also $\sqrt{dx - x^2}$ is the formula, or general value, of the ordinate to a circle, whose diameter is $d$, and abscissa $x$.