Simpson's rule is a mathematical formula used to approximate definite integrals. The method is complex, but if you need to perform this calculation in your business, you can save time by using an ...

To approximate the definite integral we split the region up into many thin slices. For each slice we may approximate its area using rectangles, in which case we could either use right-endpoints, ...

P.S.—I thank Mr. C. F. Merchant for pointing out in NATURE of June 3 that the four-ordinate rule is already in use, and for giving a reference to Tchebycheff's rules, with which I was unacquainted.