. The Southern States. MINING PKBBLE PHOSPHATE IN PEACH KIVER. cost. The entire industry is at presentvery largely in the state of transitionfrom the crude methods and machineryfirst introduced to more economicalmethods and more elaborate mechanical of mining and the very small cost ofhandling a large amount of material areits chief points, and this is really theonly practical and economical methodof mining river deposits. THE FLORIDA PHOSPHATE INDUSTRY. 351. MINING LAND PEBBLE BY HYDRAULIC SYSTEM. In working the deposits of landpebble there is a greater variety inmethods. The pebbles of phosp
. The Southern States. MINING PKBBLE PHOSPHATE IN PEACH KIVER. cost. The entire industry is at presentvery largely in the state of transitionfrom the crude methods and machineryfirst introduced to more economicalmethods and more elaborate mechanical of mining and the very small cost ofhandling a large amount of material areits chief points, and this is really theonly practical and economical methodof mining river deposits. THE FLORIDA PHOSPHATE INDUSTRY. 351. MINING LAND PEBBLE BY HYDRAULIC SYSTEM. In working the deposits of landpebble there is a greater variety inmethods. The pebbles of phosphateare intermingled with clay and sand,sometimes in the proportion of four orfive parts to one of phosphate, so thatit is necessary to handle a large amountof material to yield even a moderatedaily output of cleaned simplest and most extravagant wayis by the use of shovels and wheel-barrows, still in use at some of theworkings. In some cases the materialis dug up by grapple dredges like thoseused in river and harbor excavations,running on a railroad track and loadingthe dirt and phosphate into cars whichconvey it to the washing and drying-plant. Again the hydraulic system ofthe western gold mines is adapted tothe requirements of the land pebbleworkings and the material is handledrapidly and cheaply. A mining plantof this character, in use by the BoneValley Phosphate Company, near Bar-tow, Florida, is shown in a full pageillustration acc
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectagriculture
