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Ch. 8: Opening the Craters

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258 THE DIAMOND MINES OF SOUTH AFRICA
precautions against loss by theft. The natives, who were com­monly employed in scraping and picking over the mineral de­posit, were more carefully watched. Some were lodged in tents and sheds adjoining the stables belonging to claim-owners, and there was some oversight of them by night as well as by day. When the claim-owners combined in companies, their workmen were frequently kept together in enclosures called "compounds,"
of stolen diamonds, but in checking the drunkenness of the black workmen and the outbreaks in the canteens and streets.
Progress was made, too, though much too slowly, in the more perfect pulverization of the blue ground. It was soon observed that the broken ground would crumble upon exposure to the air, and after some weeks or months, according to its hardness, a mass of breccia, thinly spread out and raked over, would be very largely decomposed to fine sand fit for washing, without further treatment. This natural pulverization was far cheaper and better than crushing with mallets ; but the burden of accumulating and storing great quantities of ground was too heavy for the ordinary claim-holder, who was dependent upon quick returns : so only the larger companies maintained stores
Ch. 8: Opening the Craters Page of 449 Ch. 8: Opening the Craters
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