. The earth and its inhabitants .. . Australia: £300 000,000. Each square represents £400,000. great value in the reduction of the ores. Coal has been found in Sonora, on the banks of the Rio Grande, in the Sierra de Tamaulipas and in the southern uplands. Sulphur is obtained in the craters both of the active and quiescent volcanoes ; near Tuxpan are found petroleum springs ; by scratching the surface the sulphates and carbonates of soda, saltpetre, sea salt are turned up ; lastly, there occur quarries of marble, onyx, jasper, basalt, obsidian, while certain rocks abound in precious stones.

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