Florida, South Carolina und kanadische Phosphate: Vollständige Berücksichtigung ihres Auftretens, ihrer Produktionsmethoden und -Kosten, der erhöhten Quantität und der kommerziellen Bedeutung. Ng Co. In den früheren Tagen der Branche begrenzt wurde ein beträchtliches Gebiet, in dem das Wasser niedrig war, von Hand ausgebeutet, das Steingut zuerst durch Pick und Crowbar gelockert. Der Felsen war von Tauchern, sogar in Wasser, 20 Fuß tief, in der Tiefe, und in Wimbee Creek, Anfang der siebziger Jahre, war es nicht ungewöhnlich, das Wasser voller Schwarze, Schwimmen und Tauchen zu werfen, andvociferating lustig, als sie ihre Arbeitsgeräte schwenkten

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Florida, South Carolina, and Canadian phosphates: giving a complete account of their occurrence, methods and cost of production, quantitities raised, and commercial importance . ng Co. Limited In the earlier days of the industry a considerable area, where the water was low, was exploited by hand, the rockbeing first loosened by pick and crowbar. Rock was alsobrought up by divers, even in water twenty feet deep ; and inWimbee Creek, early in the seventies, it was not unusual tosee the water crowded with blacks, swimming and diving, andvociferating lustily, as they waved their implements aroundthem. Another method of raising rock—which can still beseen going on at the present day—is by the use of long tongs, which are manipulated from flat scows, capable of holdingabout four tons, two men operating from each scow. A verylarge force of men used to work in the above manner, and theCoosaw Company were at the time getting as much as three tofour hundred tons per day in this fashion. The general method, however, of mining the phosphate isby the use of dredges, though in one instance a 22-inchpump was unsuccessfully experimented with by the River andMarine Company.. South Carolina Phosphates. 161 There are 13 dredges at work at the present time in thevarious rivers and creeks. Of these eight arc of the dipper-dredge description. The machinery, which is fixed upon abarge, held in position by strong wooden spuds, consists of theusual boiler, hoisting engines with friction clutch, and enginesfor swinging the boom. The boom, usually constructed ofsteel, supports a long wooden handle, to which the bucket (withmassive steel teeth attached to the lower rim) is fastened.When at work the dipper handle is run out till the bucketreaches the bottom ; the bucket is then drawn forward andupwards by a strong chain running over the end of the boomand cuts its way into the stratum. When the bucket and dipperhandle are raised to the necessary elevation, a small chain, con-trolled by the ma

Stockbilder mithilfe von Tags suchen

• bookcentury1800
• bookdecade1890
• bookidfloridasouth
• bookyear1892