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 20
... inches thick , of small pebbles of white quartz . The mag- * See specimens in the Museum of Practical Geology , wall case 30 . nificent bed of hæmatite which then follows , varies from 20 IRON ORES OF GREAT BRITAIN .
... inches thick , of small pebbles of white quartz . The mag- * See specimens in the Museum of Practical Geology , wall case 30 . nificent bed of hæmatite which then follows , varies from 20 IRON ORES OF GREAT BRITAIN .
Page 21
... inches thick , are distinctly interstratified with the iron ore ; and the presence of these partings , with the overlying roof of impure limestone which makes its appearance on the dip , leaves on the mind almost a conviction that the ...
... inches thick , are distinctly interstratified with the iron ore ; and the presence of these partings , with the overlying roof of impure limestone which makes its appearance on the dip , leaves on the mind almost a conviction that the ...
Page 26
... inches in length . * What with the richness of the ore and its extent , this place has few rivals in the world ; you may proceed 4 or 500 feet in either direction in one solid mass of this valuable sub- stance , and nothing has yet been ...
... inches in length . * What with the richness of the ore and its extent , this place has few rivals in the world ; you may proceed 4 or 500 feet in either direction in one solid mass of this valuable sub- stance , and nothing has yet been ...
Page 31
... 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 puddling . You may pass through the thick smoke of ...
... 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 puddling . You may pass through the thick smoke of ...
Page 35
... inches each Shale measures Clay Wood or 324 Balls . Black Mine , Park gate . 325 Brown George . 326 Whetstone . COAL , Silkstone , Bromley , Sheffield , or Black Shale } 72 0 2 6 to 3 0 140 O 054 36 0 4 0 Of the ironstones which have ...
... inches each Shale measures Clay Wood or 324 Balls . Black Mine , Park gate . 325 Brown George . 326 Whetstone . COAL , Silkstone , Bromley , Sheffield , or Black Shale } 72 0 2 6 to 3 0 140 O 054 36 0 4 0 Of the ironstones which have ...
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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.