Mining: An Elementary Treatise on the Getting of MineralsLongmans, Green, 1904 - 547 страници |
Между кориците на книгата
Резултати 1 - 5 от 100.
Страница xxxii
... sufficient weight of cold air into a mine to enable miners to get the coal at a depth of even 10,000 feet . The limit fixed by the Commission of 4000 feet has been very nearly reached , if not actually reached , in Belgium , without any ...
... sufficient weight of cold air into a mine to enable miners to get the coal at a depth of even 10,000 feet . The limit fixed by the Commission of 4000 feet has been very nearly reached , if not actually reached , in Belgium , without any ...
Страница xxxiii
... sufficiently tight to prevent the passage of water . In the future the barriers left will probably not exceed 5 per cent ... sufficient . By adding to the figures of the Royal Coal Commission the deep coal , the thin coal , 1 Mr. John ...
... sufficiently tight to prevent the passage of water . In the future the barriers left will probably not exceed 5 per cent ... sufficient . By adding to the figures of the Royal Coal Commission the deep coal , the thin coal , 1 Mr. John ...
Страница xl
... sufficient expendi- ture of capital . The same remark applies to brick works and pottery works . For domestic purposes coal in this country is generally burnt in the most wasteful manner possible . The reasons for this waste are twofold ...
... sufficient expendi- ture of capital . The same remark applies to brick works and pottery works . For domestic purposes coal in this country is generally burnt in the most wasteful manner possible . The reasons for this waste are twofold ...
Страница xlii
... sufficient to supply a deficiency of coal for any great length of time , and the same remark applies to oil , the production of which , though large in one sense , is very small as compared with the production of coal . Peat is a good ...
... sufficient to supply a deficiency of coal for any great length of time , and the same remark applies to oil , the production of which , though large in one sense , is very small as compared with the production of coal . Peat is a good ...
Страница xliii
... sufficient for 330 h.-p. , or , say , 200,000 h.-p. per square mile . It is evident , therefore , that in the tropics and sub - tropics the sunshine alone . will supply sufficient power for all the manufactures of the world . In ...
... sufficient for 330 h.-p. , or , say , 200,000 h.-p. per square mile . It is evident , therefore , that in the tropics and sub - tropics the sunshine alone . will supply sufficient power for all the manufactures of the world . In ...
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.