An Elementary Class-book of Practical Coal-mining: For the Use of Students Attending Classes in Preparation for the Board of Education and County Council Examinations Or Qualifying for First Or Second Class Colliery Managers' CertificatesN.W. Henley Publishing Company, 1904 - 428 páginas |
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arrangement atmosphere boiler boreholes bottom brattice brickwork bucket cable cage capstan carbon carbonic acid Carboniferous carried cent centre chain coal coal-field coefficient of friction coke collieries compressed air consists corf corves cubic foot cylinder depth detonator disc drills driven drum electric employed explosive face feet per minute foot foot-pounds friction gates haulage heat hole inches in diameter inclination iron lamp Lancashire boiler length lever lifts load longwall lower machine method millstone grit ordinary ovens passes pillars pipe piston pressure props pulleys pump quantity raised revolutions per minute ring road rocks rods roof rope round safety-lamp screw seam shaft shown in Fig side sinking sprags square inch Staffordshire steam steel strata stroke surface temperature thickness timber tubbing tube usually valve varies velocity ventilation vertical water-gauge wedged weight wheel whilst winding engines wire yards
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Página 427 - THE COLLIERY MANAGER'S HANDBOOK. A Comprehensive Treatise on the Laying-out and Working of Collieries, Designed as a Book of Reference for Colliery Managers, and for the Use of Coal-Mining Students preparing for First-class Certificates. By CALEB PAMELY, Mining Engineer and Surveyor ; Member of the North of England Institute of Mining and Mechanical Engineers ; and Member of the South Wales Institute of Mining Engineers. With 700 Plans, Diagrams, and other Illustrations.
Página 208 - The horse power of a steam engine is given by the equation , plan = ~ where p = mean effective pressure in pounds per square inch, l = length of stroke in feet, a = area of piston in square inches, n = number of strokes per minute, or twice the number of revolutions per minute.
Página 429 - This book is just what was needed to acquaint mining men with the actual working of a process which is not only the most popular, but is, as a general rule, the most successful for the extraction of gold from tailings.
Página 429 - THE PROSPECTOR'S HANDBOOK: A Guide for the Prospector and Traveller in Search of Metal-Bearing or other Valuable Minerals. By JW ANDERSON, MA (Camb.), FRGS, Author of "Fiji and New Caledonia," Fifth Edition, thoroughly Revised and Enlarged.
Página 428 - THE IRON ORES of GREAT BRITAIN and IRELAND. Their Mode of Occurrence, Age and Origin, and the Methods of Searching for and Working Them. With a Notice of some of the Iron Ores of Spain. By JD KENDALL, FGS, Mining Engineer. Crown 8vo, cloth...
Página 428 - SURVEYING, PRACTICAL, A Text-book for Students Preparing for Examinations or for Survey Work in the Colonies. By GEORGE W. USILL, AMInst.CE Tenth Edition, thoroughly Revised and Enlarged by ALEX. BEAZELEY, M.Inst.CE With 4 Lithographic Plates and 360 Illustrations. Large crown 8vo, 7s.
Página 427 - COLLIERY WORKING AND MANAGEMENT. Comprising the Duties of a Colliery Manager, the Oversight and Arrangement of Labour and Wages, and the different Systems of Working Coal Seams. By HF BULMAN and RAS REDMAYNE.
Página 429 - Mr. Davies, in this handsome volume, has done the advanced student and the manager of mines good service. Almost every kind of machinery in actual use is carefully described, and the woodcuts and plates are good."— Athenaum.