Smithsonian Miscellaneous Collections, Volume 58 |
Contents
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Common terms and phrases
acid alcohol annealed Antimony Authority axis Becquerel Bismuth Bolivia C. G. S. units Cadmium Carbon cassiterite cast Centigrade Chem chloride coefficient column constant conversion factor Copper Cornwall cubic centimetre cubic foot density Diameter DIELECTRIC CONSTANTS dimensional formula dioxide Electrical electromotive force ether Ethyl Ethyl alcohol feet Geol geology given glass grammes grammes per cubic granite H₂O heat Hydrogen inches Index of refraction Iron Journ length liquid litre lode London magnetic measured mercury metal metres METRIC minerals Nickel nitrate Nitrous oxide oxide Phil Phys Platinum Potassium Pounds per cubic pressure Proc quantity quartz Railw ratio Regnault salt Silver SMITHSONIAN TABLES Sodium solution Specific Gravity square steel Substance sulphate Sulphur Surv table gives Temp temperature thickness tin deposits tin mines tourmaline Trans values vapor veins viscosity volume Wave-length weight Wied wire York Zeitschr Zinc ΙΟ
Popular passages
Page 308 - The unit of electro-motive force shall be what is known as the international volt, which is the electro-motive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of an international ampere...
Page xxxi - As a unit of resistance, the international ohm, which is based upon the ohm equal to 109 units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross-sectional area and of the length 106.3 centimetres.
Page xxxii - ... As a unit of electro-motive force, the international volt, which is the electro-motive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by { £ %$ of the electro-motive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15°...
Page 216 - The Assayer's Manual: An Abridged Treatise on the Docimastic Examination of Ores, and Furnace and other Artificial Products. By BRUNO KERL, Professor in the Royal School of Mines.
Page 308 - The international ohm is based upon the ohm equal to 10' units of resistance of the CGS system of electromagnetic units, and "is represented by the resistance offered to an unvarying electric current by a column of mercury, at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross section and of the length of 106.3 centimetres.
Page 307 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page xxxii - Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.
Page xxxii - As a unit of power, the watt, which is equal to io' units of power in the cgs system, and which is represented sufficiently well for practical use by the work done at the rate of one joule per second.
Page 309 - ... the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by \\\% of the electromotive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15° C., and prepared in the manner described in the accompanying specification...
Page 73 - BRITISH MINING : A Treatise on the History, Discovery, Practical Development, and Future Prospects of Metalliferous Mines in the United Kingdom. By ROBERT HUNT, FRS, Keeper of Mining Records; Editor of " Ure's Dictionary of Arts, Manufactures, and Mines,