California and the territories round her have produced one thousand millions of dollars in gold in twenty years.

Sixty-one million dollars was the largest annual gold yield ever made in Australia.

California has several times produced ninety millions of gold in a year." (Townsend, p.

384.) "The area of workable coal beds in all the world outside the United States is estimated at 26,000 square miles.

That of the United States, not including Alaska, is estimated at over 200,000 square miles, or _eight times as large as the available coal area of all the rest of the globe!_" (American Year Book for 1869, p.