A Text-book of Ore and Stone MiningGriffin, 1897 - 744 Seiten |
Im Buch
Ergebnisse 1-5 von 86
Seite xvii
... shown by Trauzl's lead block test · 216 198 200 203 204 205 207 208 225 218 • 218 219 219 219 220 221 • 221 222 222 223 223 223 224 · 225 • 225 226. Detonator , Nobel's , treble strength 227 . • quintuple strength 228. Firing a charged ...
... shown by Trauzl's lead block test · 216 198 200 203 204 205 207 208 225 218 • 218 219 219 219 220 221 • 221 222 222 223 223 223 224 · 225 • 225 226. Detonator , Nobel's , treble strength 227 . • quintuple strength 228. Firing a charged ...
Seite 38
... shown by Figs . 30 and 31. The unweathered diamond - bearing N ° 2 SHAFT BASALTIC ROCK BLACK SHALE FIG . 30 . ROCK SHAFT ORIENTAL BASALTIC ROCK BLACK SAALE MELAPHYRE FALLEN MELARHY BLUE GROUND QUARTZITE QUARTZIT SCALES 100 100 50 100 오 ...
... shown by Figs . 30 and 31. The unweathered diamond - bearing N ° 2 SHAFT BASALTIC ROCK BLACK SHALE FIG . 30 . ROCK SHAFT ORIENTAL BASALTIC ROCK BLACK SAALE MELAPHYRE FALLEN MELARHY BLUE GROUND QUARTZITE QUARTZIT SCALES 100 100 50 100 오 ...
Seite 47
... shown by the letters BAC in Fig . 37. The part A is called the " cap " or " apex " ; B is the " west leg " and C the " east leg , " because the main anticlinal axes strike N.N.W. and S.S.E. The part D is known as the " centre country ...
... shown by the letters BAC in Fig . 37. The part A is called the " cap " or " apex " ; B is the " west leg " and C the " east leg , " because the main anticlinal axes strike N.N.W. and S.S.E. The part D is known as the " centre country ...
Seite 50
... SHOWN VERZA PYRITIOUS QUARTZITE RASED DYKES 4 oz . 6 dwt . per ton . The gold was sold for £ 1,331,484 , and £ 1,100,000 was paid in dividends . Graphite . The great graphite mines of the world are those of Ceylon , where the mineral is ...
... SHOWN VERZA PYRITIOUS QUARTZITE RASED DYKES 4 oz . 6 dwt . per ton . The gold was sold for £ 1,331,484 , and £ 1,100,000 was paid in dividends . Graphite . The great graphite mines of the world are those of Ceylon , where the mineral is ...
Seite 69
... shown that they attain a thickness of very nearly 3000 feet ( 900 metres ) . The beds may be divided according to their chemical com- position into four regions , † which in descending order are : - Eldridge , " A Preliminary Sketch of ...
... shown that they attain a thickness of very nearly 3000 feet ( 900 metres ) . The beds may be divided according to their chemical com- position into four regions , † which in descending order are : - Eldridge , " A Preliminary Sketch of ...
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
adit attached belt boring Boryslaw bottom bucket cage carbonic acid carried cast-iron cent clay coal compressed air Comstock lode copper Cornwall crushed cylinder Davy lamp deposit depth district drawn drill driven drum employed engine excavation explosives feet fire-damp galena gold ground gypsum holes horizontal inches in diameter inclined Inst iron pyrites ironstone ladders lamp limestone lode lower machine machinery magnetic main rod Mansfeld Mechernich metal method metres mineral mines ordinary ozokerite particles passes phosphate piece pipe piston plate plunger pressure produced pulley pumping quantity quarries quartz revolving rock roof rope sandstone SCALE screw separate shaft shale side sieve sinking slate sometimes specific gravity steam steel stone stroke sulphur surface thick timber tube tunnel underground valve veins ventilation vertical waggon washing wheels whilst winding wire wire rope wooden yards
Beliebte Passagen
Seite 53 - KNOW YOUR OWN SHIP. BY THOMAS WALTON, NAVAL ARCHITECT. Specially arranged to suit the requirements of Ships' Officers, Shipowners, Superintendents, Draughtsmen, Engineers, and Others. This work explains, in a simple manner, such important subjects as: — Displacement. — Deadweight.— Tonnage.— Freeboard. —Moments. — Buoyancy.— Strain Structure.— Stability.— Rolling.— Ballasting. — Loading. — Shifting Cargoes. — Admission of Water.— Sail Area.
Seite 43 - The Micro-Structure of Metals and Alloys. — Economic Considerations. " No English text-book at all approaches this in the COMPLETENESS with which the most modern views on the subject are dealt with. Professor Austen's volume will be INVALUABLE, not only to the student, but also to those whose knowledge of the art is far advanced.
Seite 31 - I. — ALKALIES AND ALKALINE EARTH METALS : Magnesium, Lithium, Beryllium, Sodium, Potassium, Calcium, Strontium, Barium, the Carbides of the Alkaline Earth Metals. PART II. — THE EARTH METALS: Aluminium, Cerium, Lanthanum, Didymium. PART III. — THE HEAVY METALS: Copper, Silver, Gold, Zinc and Cadmium, Mercury, Tin, Lead, Bismuth, Antimony, Chromium, Molybdenum, Tungsten, Uranium, Manganese, Iron, Nickel, and Cobalt, the Platinum Group. " COMPREHENSIVE and AUTHORITATIVE ... not only FULL of VALUABLE...
Seite 9 - We are of opinion, therefore, that the term as used in the acts of Congress is applicable to any zone or belt of mineralized rock lying within boundaries clearly separating it from the neighboring rock.
Seite 33 - NYSTROM'S POCKET-BOOK OF MECHANICS AND ENGINEERING. Revised and Corrected by W. DENNIS MARKS, Ph.B., CE (YALE SSS), Whitney Professor of Dynamical Engineering, University of Pennsylvania. Pocket Size. Leather, 155.
Seite 38 - was designed by Professor KANJUNE at an OOCTION to the above Series of Manuals. PROF. RANKINB'S WORKS— (Continued). VII. MISCELLANEOUS SCIENTIFIC PAPERS. Royal 8vo. Cloth, 31s. 6d. Part I. Papers relating to Temperature, Elasticity, and Expansion of Vapours, Liquids, and Solids. Part II. Papers on Energy and its Transformations. Part III. Papers on Wave-Forms, Propulsion of Vessels, &c.
Seite 16 - GENERAL CONTENTS. — The Materials of the Earth — A Mountain Hollow —Down the Valley — Along the Shore — Across the Plains — Dead Volcanoes —A Granite Highland— The Annals of the Earth— The Surrey Hills— The Folds of the Mountains. "The FASCINATING ' OpEN-AlK STUDIES' Of PnOF. OOLE give the subject a GLOW OF ANIMATION . . . cannot fail to arouse keen interest in geology."— Geological Magazine.
Seite 8 - All but the simplest explanations have, therefore, been avoided, and ANSWERS to the Exercises are given. Any person may readily, by careful study, become master of their contents, and thus lay the foundation for a further mathematical course, if desired. It...
Seite 17 - Management. PART II. — SEWAGE DISPOSAL WORKS IN OPERATION— THEIR CONSTRUCTION, MAINTENANCE, AND COST. Illustrated by Plates showing the General Plan and Arrangement adopted in each District.