Aids in Practical GeologyC. Griffin, 1902 - 431 Seiten |
Im Buch
Ergebnisse 1-5 von 100
Seite xiii
... Typical granitic struc- ture of a completely crystalline igneous rock . Brown augite , clear plagioclastic felspar , and olivine , which has magnetite and serpentine developed along its cracks . 2. Torridon Sandstone , near Ullapool . x ...
... Typical granitic struc- ture of a completely crystalline igneous rock . Brown augite , clear plagioclastic felspar , and olivine , which has magnetite and serpentine developed along its cracks . 2. Torridon Sandstone , near Ullapool . x ...
Seite 15
... typical mineral . The blue and blue - green colours of vivianite will similarly become visible when flakes broken from dark crystals are held up in forceps to the light . Some minerals , on the other hand , such as magnetite , are ...
... typical mineral . The blue and blue - green colours of vivianite will similarly become visible when flakes broken from dark crystals are held up in forceps to the light . Some minerals , on the other hand , such as magnetite , are ...
Seite 20
... typical prism faces ; 124 ° 17 ′ and 55 ° 43 ′ . Zircon ; prism faces ; 90 ° . F. Cleavage . The presence or absence of cleavage should be carefully looked for , and the examination of broken fragments of a mineral with the pocket ...
... typical prism faces ; 124 ° 17 ′ and 55 ° 43 ′ . Zircon ; prism faces ; 90 ° . F. Cleavage . The presence or absence of cleavage should be carefully looked for , and the examination of broken fragments of a mineral with the pocket ...
Seite 22
... typical specimens . The hardness of small fragments of minerals can be best ascertained by drawing them across a substance already deter- mined . A thin layer of " electric cement " or similar material may be melted on to a small bar of ...
... typical specimens . The hardness of small fragments of minerals can be best ascertained by drawing them across a substance already deter- mined . A thin layer of " electric cement " or similar material may be melted on to a small bar of ...
Seite 33
... typical and known specimens should be compared with the doubtful one under the same conditions . Should complete solution take place , further qualitative tests may be applied . Ammonia , which is often carried by travellers , will thus ...
... typical and known specimens should be compared with the doubtful one under the same conditions . Should complete solution take place , further qualitative tests may be applied . Ammonia , which is often carried by travellers , will thus ...
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
abundant acid altered amphibole andesites angle appear assay augite axis balsam basal bead become biotite blowpipe blue brown calcite carbonate character cleavage cobalt colour colourless common commonly compact constituents Cretaceous crossed nicols crystalline crystals dark decomposed deposits developed encrustation epidote eurites felspar flame foliated forms fossils fragments fused garnet Geol gives glass Gotlandian grains granite granular granules green groundmass H Cl hinge-line hornblende igneous rocks iron Journ lavas leucite limestones liquid lithoidal magnetite marked mass mica microscope minerals minute nepheline Nosean observed occur olivine opaque ophitic optic ordinary orthoclase oxide pale parallel particles perpendicular Plagioclase planes plates pleochroism polarised porphyritic posterior powder prismatic prisms pyroxene quartz radial reaction Refr refractive resemble residue rhombic rhyolites rotation schists sections seen septa serpentine shell silica soda sometimes specific gravity specimens spherulites structure sulphur surface trace trachytic tube types typical umbo valve vibration-traces
Beliebte Passagen
Seite 63 - 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 33 - TRAVERSE TABLES: Computed to Four Places of Decimals for every Minute of Angle up to 100 of Distance. For the Use of Surveyors and Engineers. BY RICHARD LLOYD GURDEN, Authorised Surveyor for the Governments of New South Wales and Victoria, *»* Published with the Concurrence oj the Surveyors- General for New South Wales and Victoria. "Those who have experience in exact SURVEY-WORK will best know how to appreciate the enormous amount of labour represented by this valuable book.
Seite 35 - A MANUAL OF APPLIED MECHANICS : Comprising the Principles of Statics and Cinematics, and Theory of Structures, Mechanism, and Machines. With Numerous Diagrams. Crown 8vo, cloth, 12s. 6d. FOURTEENTH EDITION. II. A MANUAL OF CIVIL ENGINEERING : Comprising Engineering Surveys, Earthwork, Foundations, Masonry, Carpentry, Metal Work, Roads, Railways, Canals, Rivers, Waterworks, Harbours, &c.
Seite 27 - GENERAL CONTENTS. Historical and Discursive. — Dock Design. — Constructive Appliances. — Materials. — Dock and Quay Walls. — Entrance Passages and Locks. — Jetties, Wharves, and Piers. — Dock Gates and Caissons. — Transit Sheds and Warehouses. — Dock Bridges. — Graving and Repairing Docks. — Working Equipment of Docks. — INDEX. " We have never seen a more profusely-illustrated treatise. It is a most important standard work, and should be in the hands of all dock and harbour...
Seite 72 - Barrister-at-Law, Public Analyst for the County of Devon, and Medical Officer of Health for St. Marylebone. AND M. WYNTER BLYTH, BA, B.Sc., FCS GENERAL CONTENTS. — History of Adulteration. — Legislation. — Apparatus. —
Seite 40 - Examinations — Rise and Progress of Steam Propulsion — Development of Free Trade— Shipping Legislation, 1862 to 1875— " Locksley Hall" CaseShipmasters' Societies — Loading of Ships — Shipping Legislation, 1884 to 1894 — Statistics of Shipping.
Seite 63 - CONTENTS.— The Relation of Metallurgy to Chemistry. — Physical Properties of Metals. — Alloys. — The Thermal Treatment of Metals. — Fuel and Thermal Measurements. — Materials and Products of Metallurgical Processes. — Furnaces. — Means of Supplying Air to Furnaces.
Seite 76 - University College. Aberystwyth ; Examiner in Zoology, University of Aberdeen. " It would be hard to find a Text-book which would better guide the student to an accurate knowledge of modern discoveries in Botany. . . . The SCIENTIFIC ACCURACY of statement...
Seite 28 - Experiments on English and Foreign Boilers with their Heat Efficiencies shown in Fifty Tables — Fire Grates of Various Types — Mechanical Stokers — Combustion of Fuel in Boilers — Transmission of Heat through Boiler Plates, and their Temperature — Feed Water Heaters, Superheaters, Feed Pumps, &c. — Smoke and its Prevention — Instruments used in Testing Boilers — Marine and Locomotive Boilers — Fuel Testing Stations — Discussion of the Trials and Conclusions — On the Choice of...
Seite 85 - SKETCHES OF BRITISH BIRDS IN THEIR HAUNTS. BY CHARLES DIXON. The Spacious Air. — The Open Fields and Downs. — In the Hedgerows.— On Open ; Heath and Moor. — On the Mountains. — Amongst the Evergreens. — Copse and Woodland. — By Stream and Pool. — The Sandy Wastes and Mudflats.— Sea-laved Rocks.— Birds of the Cities.— INDEX. "Enriched with excellent illustrations. A welcome addition to all libraries.