Foreign bills drawn on Rotterdam in banco (i. e. bank species) are often received _there_, in any of the above species, without regard to the ⅔ which ought to be groff gelt; but when the holder of the bill desires the acceptor (which the latter cannot refuse) to write it off to his credit in the current bank of Rotterdam, and that he has there no stock, then, if he brings in specie to the bank, it must be as above specified. [Sidenote: Ditto for current bills.] Current bills, not specified by the word _banco_, are generally paid according to the following proportion: 3⁄10 in schillings of 6 stivers. 1⁄10 in dubleties of 2 stivers. 6⁄10 in good silver. [Sidenote: Ditto for merchandize.] Merchandize are paid with all kinds of Dutch silver, ⅒ only in dubleties, and ⅓ gold, less or more, or sometimes none, according to agreement. [Sidenote: The denominations of the several silver currencies not proportioned to their intrinsic value.] From this exposition of the matter, it is very evident, that all these currencies must be of different intrinsic values, in proportion to their denomination; otherwise, why all this trouble about regulating the proportion to be received in payments? [Sidenote: Cause of this.] This proceeds from two causes: first, from the wearing of the pieces; the second, from the disproportion of the fineness in pieces of the same weight and denomination. [Sidenote: Regulations concerning the weighing of silver species in banks current.] As to the first, to wit, the wearing of the coin, I shall observe, that the three denominations of the good silver, to wit, the 3 guilder pieces, the 30 stiver pieces, and the 20 stiver pieces, are put up promiscuously in the same bags; being of the same fineness, and consequently of the same value, in proportion to their weight. These bags contain 600 florins each, and the legal and full weight, with which they are weighed at the bank current of Rotterdam, is 25 marcs 5 ounces and 10 engles. Now the exact weight of a florin, according to the regulation, is, as we have said, 200.21 aces fine; then the 600 florins ought to weigh 120126 aces fine, which at the standard of 263 parts fine to 25 alloy, is 131545 aces standard: by this analogy, 263 : 120126 :: 288 : 131545; which is equal to 25 marcs 5 ounces 10 engles and 13 aces. So the weight at the bank is but 13 aces lighter than in strictness it ought to be; which is so small a difference, that it could hardly turn a scale with such a weight suspended in it: for which reason, I suppose, it is left out, for the sake of the even reckoning of 25 marcs 5½ ounces.