Report of the Superintendent ... Showing the Progress of the Work, Part 2

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U.S. Government Printing Office, 1895

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Page 174 - As a unit of resistance, the international ohm, which is based upon the ohm, equal to 109 units of resistance of the Centimeter-Gramme-Second System of electro-magnetic 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 of 106-3 centimeters.
Page 175 - The unit of quantity shall be what is known as the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. Fifth. The unit of capacity shall be what is known as the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Page 174 - 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 15 - ... jurisdiction, and on conviction thereof shall be punished for such offense by a fine of not less than twenty nor more than five hundred dollars, or by imprisonment not exceeding thirty days, or both, at the discretion of the court before which such conviction shall be had.
Page 175 - ... 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 174 - In the following specification the term silver voltameter means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and...
Page 6 - ... and shall be liable for damages sustained by the United States in consequence of such defacing, injury, or removal, to be recovered in an action on the case in any court of competent jurisdiction.
Page 174 - The liquid should consist of a neutral solution of pure silver nitrate, containing about 15 parts by weight of the nitrate to 85 parts of water. "The resistance of the voltameter changes somewhat as the current passes. To prevent these changes having too great an efftct on the current, some resistance besides that of the voltameter should be inserted in the circuit.
Page 178 - People, situate, lying, and being all along the Sea Coasts, between four and thirty Degrees of Northerly Latitude from the Equinoctial Line, and five and forty Degrees of the same Latitude, and in the main Land between the same four and thirty and five and forty Degrees, and the Islands thereunto adjacent, or within one hundred Miles of the Coast thereof...
Page 174 - The anode should be a plate of pure silver some 30 square centimetres in area and 2 or 3 millimetres in thickness. This is supported horizontally in the liquid near the top of the solution by a platinum wire passed through holes in the plate at opposite corners. To prevent the disintegrated silver which is formed on the anode from falling on to the kathode, the anode should be wrapped round with pure filter paper, secured at the back with sealing wax.

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