" For some think that they ought to fast only one day, some two, some more days; some **compute** their day as consisting of forty hours night and day; and this diversity existing among those that observe it is not a matter that has just sprung up in our times, but long ago among those before us."

The third law enables us to **compute** the time taken by the radius vector to sweep over the entire area of the orbit, which is identical with the time of revolution.

But when definitive results as to the orbits are required, it is necessary to **compute** the perturbations produced by such of the major planets as have affected the motions of the body.

If, with the changed velocity we again **compute** the elements they will be different from the former elements.

We **compute** the maximum amount of food the world can produce by beginning with total acres of land considered arable, but that is based on assumptions about the future of technology and agriculture.

To cover the special risks of mining, capital should earn a higher interest than in ordinary business, and if we assume that the sinking-fund be safely invested, we must **compute** the amortization on a lower basis than 5%.

Mathematically we have thus in all cases to **compute** present value on the basis of a deferred as well as a limited annuity.

Divide the span L into any convenient number n of equal parts of length 1, so that nl = L; **compute** the radii of curvature R 1, R2, R3 for the several sections.

As the amount of ash varies very considerably in different coals, and stands in no relation to the proportion of the other constituents, it is necessary in forming a chemical classification to **compute** the results of analysis after deduction of the ash and hygroscopic water.

Consider Jedediah Buxton of Derbyshire, England, who in the 1700s was asked to **compute** the number one would get by doubling a farthing 139 times.