Memoirs of the Geological Survey of Great Britain and the Museum of Economic Geology in LondonH.M. Stationery Office, 1856 |
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Page 15
... stone * of the iron - producing districts under consideration , emerges from beneath the coal measures of Durham and Northumberland on the east , and is bounded by a steep decli- vity overlooking the vale of Eden on the west . It ...
... stone * of the iron - producing districts under consideration , emerges from beneath the coal measures of Durham and Northumberland on the east , and is bounded by a steep decli- vity overlooking the vale of Eden on the west . It ...
Page 16
... stone and shale , locally termed " hazle " and " plate . " Certain ores of iron are interstratified with these beds ; nodules of clay ironstone , the argillaceous carbonate , are met with in some of the bands of shale , the mode of ...
... stone and shale , locally termed " hazle " and " plate . " Certain ores of iron are interstratified with these beds ; nodules of clay ironstone , the argillaceous carbonate , are met with in some of the bands of shale , the mode of ...
Page 28
... stone has taken precedence of the Cleator district , from which the ore is still conveyed by carts along the ordinary roads . A small amount of the Ulverstone hæmatite is still smelted with charcoal at the furnaces of Newland ...
... stone has taken precedence of the Cleator district , from which the ore is still conveyed by carts along the ordinary roads . A small amount of the Ulverstone hæmatite is still smelted with charcoal at the furnaces of Newland ...
Page 29
... stone was obtainable from the lower portion of the measures , principally beneath the beds of coal which are worked for export , and above the millstone grit . The courses of " stone " occur in close proximity to those coal seams which ...
... stone was obtainable from the lower portion of the measures , principally beneath the beds of coal which are worked for export , and above the millstone grit . The courses of " stone " occur in close proximity to those coal seams which ...
Page 31
... stone , and attains a thickness of only 1 foot 8 inches to 2 feet ; it differs , however , from ordinary seams in its remark- able freedom from iron pyrites and other impurities , and is exclusively used for smelting , refining , and ...
... stone , and attains a thickness of only 1 foot 8 inches to 2 feet ; it differs , however , from ordinary seams in its remark- able freedom from iron pyrites and other impurities , and is exclusively used for smelting , refining , and ...
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Common terms and phrases
acid Phosphoric acid acid Sulphuric acid action of hydrochloric Alumina Lime Magnesia Analysis by Method Anthracosia balls of Ironstone baryta from bisulphide baryta from sulphates beds bichromate of potash bisulphide of iron Black bass Carbonic acid Carbonic acid Phosphoric Cardiganshire cent Chloride of potassium Clunch coal field coal measures colour Darlaston Derbyshire Ebbw Vale Fire-clay fossil gave of carbonic gave of water grey hydrochloric acid hygroscopic Ignited insoluble residue insoluble residue gave Insoluble residue ignited Ironstone Lime Magnesia Potash lime Pyrophosphate limestone lost of water manganese Alumina Lime Manganoso-manganic oxide Alumina Peroxide of iron Phosphoric acid Phosphoric and sulphuric potash Protoxide of iron Protoxide of manganese Pyrophosphate of magnesia red heat Results tabulated rock sandstone seams Shale Shropshire Silica Alumina Peroxide solution of bichromate standard solution Sulphate of baryta Sulphate of lime Sulphuric acid Sulphuric acid Bisulphide thick trace Vein water at 100
Popular passages
Page 164 - SESSION of the GOVERNMENT SCHOOL OF MINES and of SCIENCE applied to the ARTS...
Page 93 - Chiefly a carbonate of protoxide of iron ; lustre, earthy ; colour, greenish gray ; streak, similar ; fracture, uneven, showing here and there small cavities, some of which are filled with carbonate of lime. Throughout the ore are diffused irregularly a multitude of small oolitic concretions, together with small pieces of an earthy substance resembling the ore but lighter in colour. When a mass of this ore is digested in hydrochloric acid till all carbonates and soluble silicates are dissolved, there...
Page 48 - The small quantity of sulphur (which is always suspended) is collected on a filter and thoroughly washed ; it is then incinerated at as low a temperature as possible. The residue (if any) is mixed with carbonate of soda and heated upon charcoal before the blowpipe : any globules of metal that may be obtained are dissolved and tested. Analysis of Pig Iron.
Page 46 - The filtrate from the succinate of iron was rendered alkaline by ammonia ; a few drops of bromine were added, and it was left 24 hours. The precipitate was ignited at a bright red heat and weighed as manganosomanganic oxide. 8. The insoluble portion (1) was fused with excess of the alkaline mixture obtained by decomposing Rochelle salt by heat, and washing out the mixed carbonates. The fused mass was dissolved in dilute hydrochloric acid, evaporated to dryness, the residue moistened with strong hydrochloric...
Page 229 - I cannot conceive any state of the surface, but that in which the margin of the sea was occupied by vast marine savannahs of some peat-creating plant, growing half immersed on a perfectly horizontal plain, and this fringed and interspersed with forests of trees, shedding their offal of leaves upon the marsh.
Page 229 - ... and he could not conceive of "any state of the surface adapted to account for these appearances, but that in which the margin of the sea was occupied by vast marine savannahs of some peat-creating plant, growing half immersed on a perfectly horizontal plain, and this fringed and interspersed with forests of trees, shedding their leaves on the marsh.
Page 46 - The solution (6), after precipitation of the manganese, was digested with excess of hydrochloric acid until the sulphur eliminated by decomposition of the .excess of hydrosulphate of ammonia had completely separated. The magnesia was precipitated by phosphate of soda and excess of ammonia. Generally twenty-four or forty hours were allowed for complete precipitation. The precipitate was washed with ammonia-water until no sensible residue was left by evaporation on a plate of glass, then dried, and...
Page 53 - Mem. Geol. Surv., 1856, p. 57. West Level. An altered spathose ore, in which the greater part of the carbonate has been converted into hydrated peroxide. II. A. Dick, ibid, p. 59. Rispey. Spathose ore; easily scratched by the file. No metal ppt. by H 2 S from the HC1 solution of 1,000 grains of ore. III. Dr. Percy in IL Bell. " On the Manufacture of Iron in connection with the Northumberland and Durham Coalfield.
Page 277 - Protoxide of iron Peroxide of iron Protoxide of manganese Alumina - • Lime Magnesia...
Page 142 - Peroxide of iron Protoxide of manganese Alumina . Lime . Magnesia . Carbonic acid . Phosphoric acid Bisulphide of iron Water . Organic matter Insoluble residue I.