Since 1792 to the present time, the gold coinage of the United States mint has amounted to seven hundred and forty millions of dollars, of which six hundred and fifty-five millions have been issued since 1850. The gold coinage of the French mint, since 1726, has amounted to eighty-seven hundred millions of francs, of which fifty-two hundred and fifty millions have been issued since 1850. The gold coinage of the British mint, since 1603, has amounted to two hundred and eighty millions of pounds sterling; of which seventy-five millions have been issued since 1850. The gold coinage of the Russian mint, since 1664, has amounted to five hundred and twenty-six millions of roubles, of which two hundred and sixty millions have been issued since 1850. The sovereign of England contains one hundred and twelve grains of pure metal; the new doubloon of Spain, one hundred and fifteen; the half eagle of the United States, one hundred and sixteen; the gold lion of the Netherlands, and the double ounce of Sicily, one hundred and seventeen grains each; the ducat of Austria, one hundred and six; the twenty-franc piece of France, ninety; and the half imperial of Russia, ninety-one grains. A commissioner has been despatched by the United States Government to England, France, and other countries of Europe, to confer with their respective governments upon the expediency of adopting a uniform system of coinage throughout the world, so that the coins of one country may circulate in any other, without the expense of recoinage--a consummation most devoutly to be wished. The fact that the large amount of gold which has been thrown into the monetary circulation of the world within the last fourteen years, has exercised so little influence upon the money market or prices generally, is at variance with the predictions of financial writers upon both sides of the Atlantic. The increase in the present production of gold, compared with former periods, is enormous; and it would not be surprising if, in view of the explorations which are going on in Africa, Japan, Borneo, and other countries bordering upon the equator, the product of the precious metals within the next decade should be a million of dollars _daily_. The price of gold has not diminished, although the annual product has increased fivefold within twenty years. LAST WORDS.