The Mining Engineer, Količina 24Institution of Mining Engineers., 1904 |
Iz vsebine knjige
Zadetki 1–5 od 100
Stran 44
... thickness , in a dark - coloured slate - rock which appears to be chloritic schist ( probably altered diorite ) impregnated with iron - pyrites . The structure of the vein is shown in Figs . 2 and 3 ( Plate I. ) . In Fig . 2 ( Plate I ...
... thickness , in a dark - coloured slate - rock which appears to be chloritic schist ( probably altered diorite ) impregnated with iron - pyrites . The structure of the vein is shown in Figs . 2 and 3 ( Plate I. ) . In Fig . 2 ( Plate I ...
Stran 49
... thickness and of undetermined age , * extends for some distance to the east of the city and for a considerable distance to the north of it , striking in a general north - westerly to south - easterly direc- tion and dipping south ...
... thickness and of undetermined age , * extends for some distance to the east of the city and for a considerable distance to the north of it , striking in a general north - westerly to south - easterly direc- tion and dipping south ...
Stran 52
... thickness being upwards of 13 feet , with good streaks of ore on both walls . The structure is generally brecciated ; the country - rock is slate and " porphyry . " The shoots of ore in this mine have a tendency to pitch westward . Near ...
... thickness being upwards of 13 feet , with good streaks of ore on both walls . The structure is generally brecciated ; the country - rock is slate and " porphyry . " The shoots of ore in this mine have a tendency to pitch westward . Near ...
Stran 53
... ( thickness 13-12 to 16:40 feet ) is quartz and calcite with many beautiful druses . When the vein is productive , the chief filling consists of a dark green friable * In the description of these veins , and of the Veta Madre , which ...
... ( thickness 13-12 to 16:40 feet ) is quartz and calcite with many beautiful druses . When the vein is productive , the chief filling consists of a dark green friable * In the description of these veins , and of the Veta Madre , which ...
Stran 54
... thickness of this vein varies con- siderably , from a mere salband to about 19 feet - the average being about 9.80 feet . The small veins ( thickness 2 to 6 feet ) of this group contain black threads of silver - ore ( ruby and brittle ...
... thickness of this vein varies con- siderably , from a mere salband to about 19 feet - the average being about 9.80 feet . The small veins ( thickness 2 to 6 feet ) of this group contain black threads of silver - ore ( ruby and brittle ...
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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.