The School of Mines Quarterly, Volumen30Columbia University, 1909 |
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Términos y frases comunes
addition-agent Alloys alumni amount amperes assay atoms blast furnaces boiling carbon cathode cent Chapter Chem chemical chemist chemistry chloride coal coherent color compounds containing copper cost crucible crystals current density curve CuSO cyanide dendritic crystals determined diagram dilute dissolved drill effect Electric Furnace Electro-Chem engineering eutectic experiments feet filter fluo-silicate electrolytes gelatine Gold grams harbor heat hole hydroxyl industry Iron and Steel laboratory lead Metallurgy metals method mill mineral mining claim niobium nitrate electrolytes nitrogen obtained operation oxide Pachuca permanganate pier placer mining plant plate potassium potassium permanganate precipitate present production Professor properties pyrogallol reagent Resorcinol reverberatory samples School of Mines sewage silver silver nitrate slag slime Smelter Smelting sodium sodium oxalate solution sulphate sulphuric tables tannin tantalum temperature tion titration tons treatment valency weight York zinc
Pasajes populares
Página 59 - Mining claims upon veins or lodes of quartz or other rock in place bearing gold, silver, cinnabar, lead, tin, copper, or other valuable deposits, heretofore located, shall be governed as to length along the vein or lode by the customs, regulations, and laws in force at the date of their location.
Página 4 - ... a variety and stock of knowledge. But I do not propose it as a variety and stock of knowledge, but a variety and freedom of thinking; as an increase of the powers and activity of the mind, not as an enlargement of its possessions.
Página 217 - We agree, in the light of the facts brought to our knowledge and from information received from sources which we cannot doubt, that this material basis is threatened with exhaustion. Even as each succeeding generation from the birth of the nation has performed its part in promoting the progress and development of the Republic, so do we in this generation recognize it as a high duty to perform our part; and this duty in large degree lies in the adoption of measures for the conservation of the natural...
Página 64 - That during each year and until patent has been issued therefor, at least one hundred dollars' worth of labor shall be performed or improvements made on, or for the benefit or development of, in accordance with existing law, each mining claim in the district of Alaska heretofore or hereafter located. And the locator or owner...
Página 2 - To thee did the old knight Peleus send me the day he sent thee to Agamemnon forth from Phthia, a stripling yet unskilled in equal war and in debate wherein men wax pre-eminent. Therefore sent he me to teach thee all these things, to be both a speaker of words and a doer of deeds.
Página 218 - Members of Congress and others into conference. We agree that further action is advisable to ascertain the present condition of our natural resources and to promote the conservation of the same; and to that end we recommend...
Página 218 - We declare our firm conviction that this conservation of our natural resources is a subject of transcendent importance which should engage unremittingly the attention of the nation, the states, and the people in earnest cooperation. These natural resources include the land on which we live and which yields our food; the living waters which fertilize the soil, supply power, and form great avenues of commerce; the forests which yield the materials for our homes, prevent erosion of the soil, and conserve...
Página 59 - If by any reasonable construction, in view of the surrounding circumstances, the language employed in the description will impart notice to subsequent locators, it is sufficient.
Página 217 - We, the Governors of the States and Territories of the United States of America, in Conference assembled, do hereby declare the conviction that the great prosperity of our country rests upon the abundant resources of the land chosen by our forefathers for their homes and where they laid the foundation of this great Nation. We look upon these resources as a heritage...
Página 177 - With 46 Illustrations, many of them showing the Fossils found in the Coal Measures. LIST OF CONTENTS : History. Occurrence. Mode of Formation of Coal Seams. Fossils of the Coal Measures. Botany of the Coal-Measure Plants. Coalfields of the British Isles. Foreign Coalfields. The Classification of Coals. The Valuation of Coal. Foreign Coals and their Values. Uses of Coal. The Production of Heat from Coal. Waste of Coal. The Preparation of Coal for the Market. Coaling Stations of the World. Index. This...