A Text-book of Ore and Stone MiningGriffin, 1897 - 744 Seiten |
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Seite 16
... pieces of the sides dropping in , especially if there is any sliding of the hanging wall upon the foot wall ; on the ... piece of card or paper to represent the fissure , and the " hanging wall " slid down a little , we have open spaces ...
... pieces of the sides dropping in , especially if there is any sliding of the hanging wall upon the foot wall ; on the ... piece of card or paper to represent the fissure , and the " hanging wall " slid down a little , we have open spaces ...
Seite 118
... piece of tube made of cast steel , at one end of which a number of black dia- monds are fastened into small cavities . The crown is screwed on to wrought - iron pipes , which constitute the boring rod . This is made to rotate , and the ...
... piece of tube made of cast steel , at one end of which a number of black dia- monds are fastened into small cavities . The crown is screwed on to wrought - iron pipes , which constitute the boring rod . This is made to rotate , and the ...
Seite 119
... pieces of the core often broke off of themselves and came up in the tube , it was necessary to use the extractor ... piece of boring tube C " , attached to C by the chuck C ' . The hose , E , coming from a special pump , brings in a ...
... pieces of the core often broke off of themselves and came up in the tube , it was necessary to use the extractor ... piece of boring tube C " , attached to C by the chuck C ' . The hose , E , coming from a special pump , brings in a ...
Seite 121
... piece after piece between C ' and the topmost rod projecting above the hole . Mr. Bullock has recently brought out a contrivance by which the core can be drawn up through the hollow boring rods without removing them from the hole . The ...
... piece after piece between C ' and the topmost rod projecting above the hole . Mr. Bullock has recently brought out a contrivance by which the core can be drawn up through the hollow boring rods without removing them from the hole . The ...
Seite 127
... piece ; 14 , wrench for un- screwing rods ; 15 , matching or lengthening piece ; 16 , clamp ; 17 , clamp with eye ; 18 , wrench ; 19 , retaining or supporting key ; 20 , cap ; 21 , tiller ; 22 , double wrench ; 23 , scraper ; 24 ...
... piece ; 14 , wrench for un- screwing rods ; 15 , matching or lengthening piece ; 16 , clamp ; 17 , clamp with eye ; 18 , wrench ; 19 , retaining or supporting key ; 20 , cap ; 21 , tiller ; 22 , double wrench ; 23 , scraper ; 24 ...
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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
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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.