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Rh with that of the earlier magistrates bearing the same name, and connected by some scholars, not only with the republic, but with the kings. There were also the Decemviri Sacrorum, who were custodians of the Sibylline books. Their number, which originally consisted of two, and after wards of ten, at last reached fifteen. It devolved on these functionaries not only to guard the Sibylline books, and to consult them on all emergencies of state, but also to take a prominent part in the celebration of the games of Apollo.

 DECIMAL COINAGE. It has often been proposed to substitute for our quarto-duodecimo-vicesimal system of reckoning money one entirely decimal, and therefore in harmony with the system, employed in all civilized coun tries, of reckoning numbers both integral and fractional. In the case of numbers, there is ho difficulty in regard to the standard by which to reckon ; it is unity, and all integral numbers are either so many units, tens of units, hundreds of units, &c., or combinations of these, and all fractional numbers either so many tenths of a unit, hundredths of a unit, &amp;lt;kc., or combinations of these. In the case of money, however, the selection of the standard of value, or the unit by which to reckon, constitutes the main, if not the sole, theoretical difficulty to be overcome, previous to the intro duction of a decimal coinage. Practical difficulties would arise from the unwillingness of people to make the changes in thinking and speaking that would be necessitated by new coins, or the altered values of old ones. Of all the schemes proposed in England, that which advocates the retention of the sovereign, or pound sterling, as the unit of value seems to have met with most favour. According to this scheme, the pound would be divided into 10 florins, the florin into 10 cents, and the cent into 10 mils. The name florin, as well as the coin, is in use already ; the names cent and mil would mark the relation of the corres ponding coins to the pound. The cent, being the y^th part of the pound, would represent 2|-d., or nearly 2|d. ; ihe mil, bsing the n^th part, would be worth a little less than a farthing, which is the -y^th. The coins which it would be found necessary to issue would probably be in copper, the mil = -5^., the 2-mil piece = if d., rather less than a halfpenny, and the 5-mil piece =1 id., rather less than a penny farthing ; in silver, the cent = 2 f d., the 2-cent piece = 4|d., the 5-cent piece, or shilling, and the 10-cent piece, or florin ; in gold, the half-sovereign, and the sovereign. In addition to the preceding, perhaps a double florin = 4s., in silver, and a crown = 5s., in gold, might be found convenient. The chief disadvantage of this system is that it would abolish the copper farthing, halfpenny, and penny, and the silver coins representing 3d., 4d., 6d. Since 6d. = 25 mils is the lowest number of pence which could be paid exactly in mils, inconvenience would thus be caused to the poorer classes, whose unit of value may be said to be the penny ; and difficulties would also arise in cases where fixed imposts of a penny and a halfpenny are levied, such as penny and halfpenny tolls, postages, &c. A second scheme advocates the adoption of the farthing a:s the unit of value, and its coins of account would be the farthing, the cent or doit = 10 farthings, the florin =10 cents or doits, the pound = 10 florins. The coins required for circulation would probably be in copper, the farthing, the halfpenny, the penny ; in silver, the cent or doit = 2|d., the 2-cent piece or groat = 5d., the shilling = 12|d., and the florin = 25d. ; in gold, the half-sovereign = 10s. 5d., and the sovereign = 20s. 1 Od. Here also a silver double florin = 4s. 2d., and a gold crown = 5s. 2|d., might be found con venient. The chief disadvantages of this system would be the abolition of the present pound sterling, the unit of value in national finance, in banks, insurance and all great -com mercial offices, and the trouble that would thereby be caused in comparing values expressed in the old coinage with those of the new. Among its advantages may be reckoned the fact that, during the transition to the new state of things, the old coins would still be serviceable, for any sum of money expressed in the new coinage could be paid by means of them. The alterations on small imposts, requisite under the first scheme, would here be unnecessary ; and inconvenience would be saved to those classes of the population who receive weekly wages, which are generally fixed at so many pence per hour. The reduction of sums expressed in the old coinage to their equivalents in the new would, however, be slightly more difficult than under the first system. A third scheme proposes as the unit the half-sovereign, a coin almost as familiar as the sovereign, with the view of having only three instead of four coins of account. The half-sovereign would be divided into 10 shillings as at present, and the shilling into 10 pence, each of which would therefore be equivalent to l|-d., or 20 per cent, more than the present penny. As a penny is of more value than the metal of which it is made, the present copper coinage could be made to serve under the new system. This scheme, from its alteration of the value of the penny, is open to most of the objections that can be brought against the first ; and, in comparing accounts expressed in the old and the new coinages, it would necessitate a very slight inconvenience certainly multiplication or division by 2. A fourth scheme proposes that the penny be made the unit of value, and that all accounts should be kept in tenpences and pence. All the present coins, though only one of them would be a coin of account, could still remain in circulation ; and only two new coins would be required, the tenpence and its half, fivepence. It has also been proposed that there should be only two coins of account, the higher equivalent to 100 of the lower, such as florins and cents, the cent in this scheme being the mil of the first. Centesimal coinage similar to this exists in several foreign countries, &c. ; but it is probable that, should a change bs made, the practice of other nations will be imitated only where it is found to conduce to national convenience. The preceding are the most important of the schemes that have been suggested to replace the present system, and the adoption of the first of them has been recommended by a committee of the House of Commons. But since 1855 public opinion on the question does not appear to have advanced much. The arguments for and against a change are numerous, and to detail them would be to fill a moderate volume. The principal reason for making the change is that calculation would be enormously simplified, for reduction from one denomination of money into another could always be performed at sight ; and the compound rules, as far as money is concerned, would be virtually abolished. The greatest objections to the change, apart from the difficulty of getting people to make it, which is doubtless much exaggerated, are that a decimal system does not admit to a sufficient extent of binary subdivision, and that it does not admit of ternary subdivision at all. The third part, for instance, of a pound, of a florin, of a cent, being 333^, 33J, 3J mils respectively, could not be exactly paid in decimal currency, while there is no difficulty in paying the third part of a pound, or of a shilling by our present coinage. Again, the J,, of the pound, the , of the florin, and the | of the cent are the only binary subdivisions possible with the decimal coins of account ; the i, I, |, T V, A, A of the pound, and the, , $ of the shilling are possible at present. Notwithstanding these drawbacks, the advantages of a decimal system seem con- 