Mining: An Elementary Treatise on the Getting of MineralsLongmans, Green, 1904 - 547 страници |
Между кориците на книгата
Резултати 1 - 5 от 45.
Страница xiv
... B 126 181. Cast - iron tubbing , internal flanges , faced and bolted 182. Cast - iron wall - box 128 129 183. Brick - and - cement coffering 130 FIGURE 184 , 185. Brick - and - cement coffering xiv LIST OF FIGURES . FIGURE.
... B 126 181. Cast - iron tubbing , internal flanges , faced and bolted 182. Cast - iron wall - box 128 129 183. Brick - and - cement coffering 130 FIGURE 184 , 185. Brick - and - cement coffering xiv LIST OF FIGURES . FIGURE.
Страница xvi
... walls . 236. South Staffordshire thick - coal workings : plan 171 172 237 . 238 . " " section " " 173 " " " " enlarged ... wall , covered 190 271. Air - pipes 190 FIGURE 272. Application of brattice and air - pipes . xvi LIST OF FIGURES .
... walls . 236. South Staffordshire thick - coal workings : plan 171 172 237 . 238 . " " section " " 173 " " " " enlarged ... wall , covered 190 271. Air - pipes 190 FIGURE 272. Application of brattice and air - pipes . xvi LIST OF FIGURES .
Страница xxvii
... wall system , in which the whole of the coal is extracted , provided there is a cover of about 90 yards or more , headings being carried in advance so as to prove any faults . The number of collieries in the Northern Coal - field is 440 ...
... wall system , in which the whole of the coal is extracted , provided there is a cover of about 90 yards or more , headings being carried in advance so as to prove any faults . The number of collieries in the Northern Coal - field is 440 ...
Страница 21
... WALL QUARTZ IRON LEAD ZING COPPER SILVER FOOT GOLD GOLD VEIN chasms , and pipes have been filled up FIG . 31. - Section of gold - vein . with a mineral deposit containing vein - stuff ( ie . valueless minerals ) and ore ( i.e. valuable ...
... WALL QUARTZ IRON LEAD ZING COPPER SILVER FOOT GOLD GOLD VEIN chasms , and pipes have been filled up FIG . 31. - Section of gold - vein . with a mineral deposit containing vein - stuff ( ie . valueless minerals ) and ore ( i.e. valuable ...
Страница 94
... wall perfectly straight , any cavities behind the wall being filled up with small rubbish ; in soft ground near the surface the wall is sometimes backed with concrete . In proceeding to sink below this first length , the ground directly ...
... wall perfectly straight , any cavities behind the wall being filled up with small rubbish ; in soft ground near the surface the wall is sometimes backed with concrete . In proceeding to sink below this first length , the ground directly ...
Съдържание
64 | |
71 | |
81 | |
117 | |
125 | |
131 | |
138 | |
188 | |
203 | |
208 | |
231 | |
243 | |
286 | |
294 | |
333 | |
335 | |
364 | |
373 | |
374 | |
388 | |
397 | |
418 | |
424 | |
441 | |
481 | |
482 | |
497 | |
546 | |
Други издания - Преглед на всички
Често срещани думи и фрази
air-current air-road anemometer bars bore-hole boring bottom brattice brick cage capstan cent centre coal measures coal-dust Coal-field colliery compressed conductors cubic foot cylinder Davy lamp depth detonator dirt distance drill driven drum electric engine fire-damp flame flange foot foot-pounds friction fulminate of mercury furnace gauze ground gunpowder haulage heat hole hoppet inches in diameter incline iron ironstone lamp length lifted load lower machine Millstone Grit mineral mines minute outcrop pass Permian pillars pipe piston pit-bottom plate props pulley pump road rocks rods roof rope rule safety-lamp sandstone screw seam of coal shaft shale shown in Fig shows side sinking sometimes speed spur-gearing square inch stalls steam steel stone strata stroke surface temperature thick timber tons tubbing tube upcast valves vein velocity vertical waggons Warwickshire water-gauge wedge weight wheel wire yards
Популярни откъси
Страница 4 - INTRODUCTION TO THE STUDY OF CHEMICAL PHILOSOPHY. The Principles of Theoretical and Systematic Chemistry. With 5 Woodcuts.
Страница 36 - NOTES OF A COURSE OF NINE LECTURES ON LIGHT, delivered at the Royal Institution of Great Britain, 1869. Crown 8vo. , is. 6d. -NOTES OF A COURSE OF SEVEN LECTURES ON ELECTRICAL PHENOMENA AND THEORIES, delivered at the Royal Institution of Great Britain, 1870.
Страница 30 - DIRECTIONS FOR CLASS WORK IN PRACTICAL PHYSIOLOGY : Elementary Physiology of Muscle and Nerve and of the Vascular and Nervous Systems. By EA SCHAFER, LL.D., FRS, Professor of Physiology in the University of Edinburgh. With 48 Diagrams. 8vo., 31.
Страница 21 - Our Place among Infinities : A Series of Essays contrasting our Little Abode in Space and Time with the Infinities Around us.
Страница 36 - VOL. I. :— The Constitution of Nature— Radiation— On Radiant Heat in relation to the Colour and Chemical Constitution of Bodies— New Chemical Reactions produced by Light — On Dust and Disease — Voyage to Algeria to observe the Eclipse — Niagara — The Parallel Roads of Glen Roy — Alpine Sculpture — Recent Experiments on...
Страница 21 - Other Worlds than Ours ; The Plurality of Worlds Studied under the Light of Recent Scientific Researches.
Страница 32 - BRODIE. — THE ESSENTIALS OF EXPERIMENTAL PHYSIOLOGY. For the Use of Students. By TG BRODIE, MD, Lecturer on Physiology, St. Thomas's Hospital Medical School. With 2 Plates and 177 Illustrations in the Text. 8vo. , 6s. 6d. CHAPMAN.— -THE FORAMINIFERA : An Introduction to the Study of the Protozoa.
Страница 30 - QUAIN'S (JONES) ELEMENTS OF ANATOMY. The Tenth Edition. Edited by EDWARD ALBERT SCHAFER, FRS, Professor of Physiology in the University of Edinburgh ; and GEORGE DANCER THANE, Professor of Anatomy in University College, London. VOL. I., PART I. EMBRYOLOGY.
Страница 22 - A NEW STAR ATLAS, for the Library, the School, and the Observatory, in Twelve Circular Maps (with Two Index Plates). Intended as a Companion to 'Webb's Celestial Objects for Common Telescopes.
Страница 22 - HALF-HOURS WITH THE STARS : a Plain and Easy Guide to the Knowledge of the Constellations. Showing in 12 Maps the position of the principal Star-Groups night after night throughout the year. With Introduction and a separate Explanation of each Map. True for every Year.