Date: 1825
288 TRAVELS IN THE CENTRAL PORTIONS come to be extensively worked in the rock, the efforts which are now scattered over an immense surface will be concentrated upon particular points, and the obser vations of the most eminent miners and geologists of Europe will be open before us, to guide our subter ranean operations.  The introduction of the steam engine into this section of country will form a new era in the mining of Missouri, and produce the same astonishing effects which have resulted in other places from this capital invention.  It is only a few years since this power was first employed in the South American mines.