. The Iron and steel magazine. ayers of limestone. As the waters,heavily laden with vegetable matter in process of decompo-sition and hence highly carbonized, flowed through the lime-stone, it dissolved out large quantities of the rock, thus forminggreat cavities and caverns. Now the Old Red Sandstone is rich 304 The Iron and Steel Magazine in iron. In fact its reddish color is due to oxide of iron, justas the red color of the blood is due to iron. When, therefore,either by grinding glacier or raging torrent, denudation of thesandstone rocks took place, the oxide in the finely divided par-ticl
. The Iron and steel magazine. ayers of limestone. As the waters,heavily laden with vegetable matter in process of decompo-sition and hence highly carbonized, flowed through the lime-stone, it dissolved out large quantities of the rock, thus forminggreat cavities and caverns. Now the Old Red Sandstone is rich 304 The Iron and Steel Magazine in iron. In fact its reddish color is due to oxide of iron, justas the red color of the blood is due to iron. When, therefore,either by grinding glacier or raging torrent, denudation of thesandstone rocks took place, the oxide in the finely divided par-ticles of sand was dissolved by the vegetable acids into carbon-ate of protoxide of iron. As this solution of iron floated alongin the drift it was acted upon by the oxygenated atmosphere,iridescent films would appear on the surface of the flood, indi-cating that the protoxide had been transformed into peroxideof iron. These insoluble films of iron oxide, being of gravity than the rest of the drifting material, and. !^Eo one Fig 2. Egremont Mine, England becoming heavy masses by the addition of new particles, sankto the bottom, filling up the cavities and deep fissures, andgradually solidified into solid beds of red haematite iron ore, asillustrated in Fig. 2. To a like origin may be traced the formation of the famousbed of hematite ore in the Chapin Mine, near Iron Mountain,Mich., U. S. A. (Fig. 3). This is the greatest deep mine deposit of ore being workedin the world to-day, and was opened in 1880. It consistsof four lenticular deposits, 2,500 feet long, 130 feet wide, depthunknown. The ore contains 63 per cent of metallic iron, cent phosphorus. Descriptive Mctalhiri:^} of Iron and Steel 305 Phosphonis. — Mention of the phosphoric contents of theChapin Mine ore opens the way for an explanation of the reasonwhy the extensive beds of carbonate iron ores which abound inthe Est on Hills of Yorkshire, England, and in the broad seamsrunning from New Jersey, t
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectiron, bookyear1898
