The Mining Engineer, Količina 24Institution of Mining Engineers., 1904 |
Iz vsebine knjige
Zadetki 1–5 od 76
Stran 26
... direction to the intake air - current . On its way , it liberates further gas from coal - dust that is thrown up ; it , therefore , constantly requires fresh air , and thus continues its course to the downcast - shaft , which it also ...
... direction to the intake air - current . On its way , it liberates further gas from coal - dust that is thrown up ; it , therefore , constantly requires fresh air , and thus continues its course to the downcast - shaft , which it also ...
Stran 45
... direction of the strike . The hanging - wall , near the surface , has a clay - selvage with slick- ensides . When the calcite has an opaque white - and - pink mottled ( or altered ) appearance , and the quartz is flinty and streaked ...
... direction of the strike . The hanging - wall , near the surface , has a clay - selvage with slick- ensides . When the calcite has an opaque white - and - pink mottled ( or altered ) appearance , and the quartz is flinty and streaked ...
Stran 46
... direction , † so it is most probably of later origin . The schistose country has been considerably altered close to the contact the rock has a mottled red - and - purple colour , and the schistose structure is more or less obliterated ...
... direction , † so it is most probably of later origin . The schistose country has been considerably altered close to the contact the rock has a mottled red - and - purple colour , and the schistose structure is more or less obliterated ...
Stran 47
... direction , but do not pass to the south . Nevertheless the foot - wall portion of the vein bears traces only of complex ores containing lead and zinc , the rich and docile ores being confined to the hanging - wall for a width of 63 to ...
... direction , but do not pass to the south . Nevertheless the foot - wall portion of the vein bears traces only of complex ores containing lead and zinc , the rich and docile ores being confined to the hanging - wall for a width of 63 to ...
Stran 48
... direction - hence they meet both horizontally and vertically . A few veins in this district course about east and west , and dip northward in black slate . The ores are galena , pyrites , blende ( abundant ) , and pyrargyrite ( rosieler ...
... direction - hence they meet both horizontally and vertically . A few veins in this district course about east and west , and dip northward in black slate . The ores are galena , pyrites , blende ( abundant ) , and pyrargyrite ( rosieler ...
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Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
Alston Alston moor apparatus ARTHUR Barnsley Bishop Auckland boilers Boring vol Carbon cent Chester-le-Street Chesterfield coal coal-cutting coal-field coke coke-ovens Colliery Manager condenser cost County Durham cubic centimetres cylinder depth Derby district Durham EDWARD electric electric horsepower experience explosion feet gases GEORGE Glasgow H.M. Inspector Hall HENRY Hill horsepower House Inspector of Mines Inst Institute of Mining iron JAMES Johannesburg JOHN kilogrammes Leeds Limestone Limited Lindsay Wood London Marl-slate Mechanical Engineers mineral Mining and Mechanical Mining Engineers mining-engineers Nenthead Newcastle Newcastle-upon-Tyne North of England Northumberland Nottingham obtained output ovens oxygen P.O. Box paper Permian pounds per square PRESIDENT pressure Prof pump revolutions per minute Road ROBERT seam shaft Sheffield Sinking vol South Wales square inch Staffordshire steam Stoke-upon-Trent Street Terrace thick THOMAS timber tion tons Trans Transactions Transvaal turbine vein vote of thanks wagons Walsall West Whin Sill WILLIAM writer Yellow Sands
Priljubljeni odlomki
Stran 430 - ... with a cross section, not exceeding sixty square feet; (d) no district .shall have its length when parallel to the general trend of the adjoining shore greater than one mile; (e) a proposed system of working the mineral in each submarine area shall before work is commenced be submitted to and approved of by the Inspector; and no change shall be made in such approved system without the written sanction of the Inspector; (f) the opening of a new lift or level in a mine already working in a submarine...
Stran iv - The probability of finding workable seams of Coal in the Carboniferous Limestone or Bernician formation, beneath the regular Coal Measures of Northumberland and Durham, with an account of a recent deep boring made in Chopwell Woods, below the Brockwell Seam.
Stran 129 - President, in the Chair. The Minutes of the last General Meeting were read and confirmed. The following Annual Report of the Council was then read : — ANNUAL REPORT OF THE COUNCIL.
Stran 360 - Reconnaissances in the Cape Nome and Norton Bay Regions, Alaska, in 1900. By Alfred H. Brooks, George B. Richardson, Arthur J. Collier, and Walter C. Mendenhall.
Stran 358 - Sheet is properly drawn up so as to exhibit a true and correct view of the state of the...
Stran 550 - In a paper read before the North of England Institute of Mining and Mechanical Engineers, in 1898, Mr.
Stran 348 - Working Coal under the River Hunter, the Pacific Ocean and its Tidal Waters, near Newcastle, in the State of New South Wales.
Stran 579 - Lancashire boilers, each 30 feet long and 8 feet in diameter, working at a pressure of 100 Ibs.
Stran 227 - ... and such report shall be recorded in a book to be kept at the mine for the purpose, and shall be signed by the person who made the same.
Stran 348 - Engineers are the same as last year, namely the Midland Counties Institution of Engineers: the Midland Institute of Mining, Civil and Mechanical Engineers; the Mining Institute of Scotland ; the North of England Institute of Mining ami Mechanical Engineers: the North Staffordshire Institute of Mining and Mechanical Engineers: and the South Staffordshire and East Worcestershire Institute of Mining Engineers.