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Another effort has been made to attract commercial enterprise to this region by offering any mining company permission to search for the ores and work them.
Surface gathering of metals, anterior to mining Earliest known mining operations Earliest Phoenician mining in Phoenicia Proper Mines of Cyprus Phoenician mining in Thasos and Thrace in Sardinia in Spain Extent of the metallic treasures there Phoenician methods not unlike those of the present day Use of shafts, adits, and galleries Roof of mines propped or arched Ores crushed, pounded, and washed Use of quicksilver unknown Mines worked by slave labour.
The ranges on either side of the glen were generally varieties of gneiss and granite, in many of which feldspar predominated, coarse ferruginous sandstone, and a siliceous rock with mammillary hematite and hornblende. These, and a great mixture of iron ores, composed the first or eastern line of Stanley's Barrier Range.
Quartz veins extend sometimes for miles, and it is necessary to suppose on the hydro-thermal theory that the fissures remained open sufficiently long for the gradual deposition of the veinstones, without the soft and shattered rocks at their sides falling in, nor yet fragments from above; although there are many lodes, fully twenty feet in width, filled entirely with quartz and mineral ores, without any included fragments of fallen rocks, and nowhere showing any trace of regular deposition on the sides.
He requested the assistance of the most wealthy and the most generous of nations; and he offered them as security for their advances his gold and silver mines, which, for the breadth of their veins and the richness of their ores, he said, were unequalled.
The science of calcination consists of the method by which the sulphide ores, having been crushed to a proper degree of fineness, are raised to a sufficient temperature and brought into intimate contact with atmospheric air.
"Then give me your half-krone, and I'll go to the town and sell them for you. They cost thirty-five ores, for Karl says so, and his mother washes the floor in the chemist's shop." Pelle got up, not to fetch the half-krone he would not part with that for all the world but to assure himself that it still lay in his waistcoat pocket.
Ores and salts of the metals were also vapourised, and it was clear that a powerful engine of research had been placed in the hands of the chemist. As a matter of fact, the temperature of the carbons in the arc is comparable to that of the Sun. It measures 5000 to 10,000 degrees Fahrenheit, and is the highest artificial heat known.
Long before this situation arose, it had been recognized by Eastern iron-masters that sooner or later the deposits of high-grade ore would be exhausted, and, in consequence, there would ensue a compelling necessity to fall back on the low-grade magnetic ores. For many years it had been a much-discussed question how to make these ores available for transportation to distant furnaces.
Winters and his son were in a close consultation. The third man was busily engaged in looking at some ores, his back towards the door, while beside him stood Van Dorn, indifferently watching him.
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