in Scots law. See Law, No clxix.

1—3.

the law of England, has two significations; the one of which is an estate left, which continues during a particular estate in being; and the other is the returning of the land, &c. after the particular estate is ended; and it is further said, to be an interest in lands, when the possession of it fails, or where the estate which was for a time parted with, returns to the grantors, or their heirs. But, according to the usual definition of a reversion, it is the residue of an estate left in the grantor, after a particular estate granted away ceases, continuing in the grantor of such an estate.

The difference between a remainder and a reversion consists in this, that the remainder may belong to any man except the grantor; whereas the reversion returns to him who conveyed the lands, &c.

In order to render the doctrine of reversions easy, we shall give the following table; which shows the present value of one pound, to be received at the end of any number of years not exceeding 40; discounting at the rate of 5, 4, and 3 per cent. compound interest.

| Years | Value at 5 per cent. | Value at 4 per cent. | Value at 3 per cent. | |-------|-------------------|---------------------|---------------------| | 1 | .9524 | .9615 | .9709 | | 2 | .9070 | .9245 | .9426 | | 3 | .8638 | .8898 | .9151 | | 4 | .8227 | .8548 | .8885 | | 5 | .7835 | .8219 | .8626 | | 6 | .7462 | .7903 | .8375 | | 7 | .7107 | .7599 | .8131 | | 8 | .6768 | .7307 | .7894 | | 9 | .6446 | .7026 | .7664 | | 10 | .6139 | .6756 | .7441 | | 11 | .5847 | .6496 | .7224 | | 12 | .5568 | .6246 | .7014 | | 13 | .5303 | .6006 | .6809 | | 14 | .5051 | .5775 | .6611 | | 15 | .4810 | .5553 | .6419 | | 16 | .4581 | .5339 | .6232 | | 17 | .4363 | .5134 | .6050 | | 18 | .4155 | .4936 | .5874 | | 19 | .3957 | .4746 | .5703 | | 20 | .3769 | .4564 | .5537 | | 21 | .3589 | .4388 | .5375 | | 22 | .3418 | .4219 | .5219 | | 23 | .3255 | .4057 | .5067 | | 24 | .3100 | .3901 | .4919 | | 25 | .2953 | .3757 | .4776 | | 26 | .2812 | .3607 | .4637 | | 27 | .2678 | .3468 | .4502 | | 28 | .2551 | .3335 | .4371 | | 29 | .2429 | .3206 | .4243 | | 30 | .2314 | .3003 | .4120 | | 31 | .2204 | .2905 | .4000 | | 32 | .2099 | .2811 | .3883 | | 33 | .1999 | .2741 | .3770 | | 34 | .1903 | .2636 | .3660 | | 35 | .1813 | .2534 | .3554 | | 36 | .1726 | .2437 | .3450 | | 37 | .1644 | .2343 | .3350 | | 38 | .1566 | .2253 | .3252 | | 39 | .1491 | .2166 | .3158 | | 40 | .1420 | .2083 | .3066 |

The The use of the preceding table.—To find the present value of any sum to be received at the end of a given term of years, discounting at the rate of 3, 4, or 5 per cent., compound interest. Find by the above table the present value of £1. to be received at the end of the given term; which multiply by the number of pounds proposed, (cutting off four fingers from the product on account of the decimals) then the result will be the value sought: For example, the present value of 10,000l. to be received 10 years hence, and the rate of interest 5 per cent. is equal to \(6139 \times 10,000 = 6139,000\) l. or 6139l. Again, the present value of 10,000l. due in 10 years, the rate of interest being 3 per cent. is \(7441 \times 10,000 = 7441\).

**Reversion of Series**, in algebra, a kind of reversed operation of an infinite series. See SERIES.

**Revivification**, in chemistry, a term generally applied to the distillation of quicksilver from cinnamon.

**Review** (commission of), is a commission sometimes granted, in extraordinary cases, to revise the sentence of the court of delegates, when it is apprehended they have been led into a material error. This commission the king may grant, although the statutes 24 and 25 Hen. VIII. declare the sentence of the delegates definitive; because the pope as supreme head by the canon law used to grant such commission of review; and such authority as the pope heretofore exerted is now annexed to the crown by statutes 26 Hen. VIII. c. 1. and 1 Eliz. c. 1. But it is not matter of right, which the subject may demand ex debito justitiae; but merely a matter of favour, and which therefore is often denied.

**Review**, is the drawing out all or part of the army in line of battle, to be viewed by the king, or a general, that they may know the condition of the troops.

At all reviews, the officers should be properly armed, ready in their exercise, salute well, in good time, and with a good air; their uniform genteel, &c. The men should be clean and well dressed; their accoutrements well put on; very well fixed in their ranks; the sergeants expert in their duty, drummers perfect in their beatings, and the fifers play correct. The manual exercise must be performed in good time, and with life; and the men carry their arms well; march, wheel, and form with exactness. All manoeuvres must be performed with the utmost regularity, both in quick and slow time. The firings are generally 36 rounds; viz. by companies; by grand divisions; by sub-divisions; obliquely, advancing, retreating; by files; in the square; street firings, advancing and retreating; and lastly, a volley. The intention of a review is, to know the condition of the troops, to see that they are complete and perform their exercise and evolutions well.

**Revolution**, in politics, signifies a grand change or turn in government. In this sense the revolution is used by way of eminence for the great turn of affairs in England in 1688, when king James II. abdicating the throne, the prince and princess of Orange were declared king and queen of England, &c.

In geometry, the revolution of any figure is its motion quite round a fixed line as an axis. The revolution of a planet or comet is nothing but its course from one point of its orbit till it returns to the same revolution again.

**Revulsion**, in medicine, turning a flux of humours from one part to another by bleeding, cupping, friction, sinapisms, blisters, fomentations, bathings, ouches, sets, strong purging of the bowels, &c.