. The earth and its inhabitants .. . Easb oF Greenwich 144 120 Miles. mining operations became continually less remunerative according as the precious metals diminished in relative value. Since the discovery of the gold-fields in 1851 down to the year 1887, the total quantity of gold recovered by the miners reached the enormous sum of £320,000,000, or more than £8,000,000 a year. The tin- mines, which occur chiefly in Queensland, and the highly productive copper-mines of South Australia also contribute to feed the export trade of the colonies, while

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeography, bookyear18