A Text-book of Ore and Stone MiningGriffin, 1897 - 744 Seiten |
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Seite 4
... pressure upon pre - existing crystalline rocks . We therefore may classify the principal rocks as follows : 1. Stratified 2. Unstratified . } · Sedimentary origin . Chemical origin . Organic origin . { Volcanic . Plutonic . The ...
... pressure upon pre - existing crystalline rocks . We therefore may classify the principal rocks as follows : 1. Stratified 2. Unstratified . } · Sedimentary origin . Chemical origin . Organic origin . { Volcanic . Plutonic . The ...
Seite 88
Clement le Neve Foster. lateral pressure may have been sufficient to cause great crumplings and contortions , and in places to invert the order of succession , in other words to make the newer beds lie under , instead of above , the ...
Clement le Neve Foster. lateral pressure may have been sufficient to cause great crumplings and contortions , and in places to invert the order of succession , in other words to make the newer beds lie under , instead of above , the ...
Seite 132
... pressure to drive the teeth of the wedge into the core and break it off . In the meantime the slot / has passed over the stud m ; the wedge is thus prevented from slipping down , and the core is held till it is drawn up to the surface ...
... pressure to drive the teeth of the wedge into the core and break it off . In the meantime the slot / has passed over the stud m ; the wedge is thus prevented from slipping down , and the core is held till it is drawn up to the surface ...
Seite 163
... pressure through condensation in the pipes , the inconvenience and danger of leaks , the discomfort of the BREAKING GROUND . 163 Transmission of Power By Water Electricity Excavating Machinery Circular Saws 202 Endless Chains with ...
... pressure through condensation in the pipes , the inconvenience and danger of leaks , the discomfort of the BREAKING GROUND . 163 Transmission of Power By Water Electricity Excavating Machinery Circular Saws 202 Endless Chains with ...
Seite 164
... pressure pro- duced by the machine ; when the piston reverses its stroke , this air expands , and the admission valves will not open until its pressure has been reduced to a point just below that of the atmosphere . The first part of ...
... pressure pro- duced by the machine ; when the piston reverses its stroke , this air expands , and the admission valves will not open until its pressure has been reduced to a point just below that of the atmosphere . The first part of ...
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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.