1_mo_, The less surface any piece has in proportion to its mass, the less it is worn in circulation; and as all coin is made cylindrical, that whose form approaches nearest to the cylinder, whose height is equal to its diameter, must have the least. Coin therefore ought to be made thick, and for this reason louis d’ors are of a better form than guineas, and guineas of a far better form than ducats. Were it easy to give the surface a spheroidal form on both sides, rendring the coin thicker in the middle than at the edges, the surface would be thereby a little more diminished. [Sidenote: The advantage of heavy pieces for the greater part of the coin; yet small denominations are useful, in some cases, for preventing the rise of prices.] 2_do_, The great credit of paper in England, is a vast advantage in many respects. It renders coin less necessary. While that credit subsists, large payments will always be made in paper; and this renders the coinage of gold in large heavy pieces less necessary. The coin, therefore, in England, ought to be calculated for the easy changing of bank notes, not with a view to the making great payments in it. For this purpose, two and three pound pieces might be full as convenient as single guineas, and half guineas might be proscribed. Small denominations of gold coin lead to expence, and tend to raise the prices of such commodities as people of fashion pay immediately out of their own pockets. As for the silver, the same principles are to be observed. Crown pieces are very convenient in payments, and have a great advantage over shillings and sixpences in point of surface. The practice in France of coining the greatest part of their silver in such pieces abundantly shews how few of the lesser denominations (that is shillings, &c.) are necessary for carrying on circulation. [Sidenote: Mixt metal better than copper for small denominations, as appears from the practice in Germany.] 3_tio_, The copper coin of England is exceedingly bulky, in order to give it an intrinsic value. This makes many people ashamed to carry it; consequently increases expence, and raises the price of many things for the reason already given.