Mr M'Culloch observes in his _Commercial Dictionary_--"Should _eight or ten millions_ yearly, in addition to the present supply, be obtained from any other source, it will produce a gradual alteration of prices, similar to that which took place three centuries ago on the discovery of the mines of Mexico and Peru." No one can doubt that this observation is well founded; but if the effect of eight or ten millions annually added to the treasures of the world would be so considerable, what must the effect of the addition of sixteen or eighteen millions? Yet this addition is just _now going on_. In the month of August last, the gold shipped at San Francisco alone was 2,984,000 dollars, or about £800,000; and supposing a half more was raised, of which no account is kept, this is £1,200,000 in a single month! In five weeks from September 1, the quantity shipped was 5,000,000 dollars, or above £1,200,000; which implies at least £1,800,000 altogether obtained. This is from the labour of 40,000 or 50,000 persons only, who are at present engaged in the diggings; but it is known that from 80,000 to 90,000 will be engaged in them next year, so that the supply raised may be expected to be nearly doubled. There is great inequality in the amount obtained by individual persons employed in that laborious occupation; but taking the average, it is about four and a half dollars a day. Call it four only, and suppose they work 250 days in the year, each person at this rate will raise 1000 dollars' worth of gold, or nearly £250. At that rate, 50,000 persons would raise £12,500,000 in a year; and 75,000, £18,750,000;--which coincides very nearly with the result derived as above from other sources of information.