Electric Lighting: A Practical Exposition of the Art, for the Use of Engineers, Students, and Others Interested in the Installation Or Operation of Electrical Plants, Том 1Van Nostrand, 1896 |
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Сторінка 8
... latter part of the seventeenth and early in the eighteenth century numerous experiments were made with dis- charges in air or rarefied gas . The record of these may be found in a book entitled Physico- Mechanical Experiments on Various ...
... latter part of the seventeenth and early in the eighteenth century numerous experiments were made with dis- charges in air or rarefied gas . The record of these may be found in a book entitled Physico- Mechanical Experiments on Various ...
Сторінка 20
... latter may be easily omitted . Approximate values for mental calculations are given in many instances , the error being usually less than one per cent . MEASURES OF LENGTH . APPROX . ACTUAL LOGARITHM . VALUE . NUMBER . Millimeters in ...
... latter may be easily omitted . Approximate values for mental calculations are given in many instances , the error being usually less than one per cent . MEASURES OF LENGTH . APPROX . ACTUAL LOGARITHM . VALUE . NUMBER . Millimeters in ...
Сторінка 21
... * depend- ing upon the specific heat of water and the force of gravity . Everett's C. G. S. System of Units , 1891 Edit . , pp . 99-101 . Accepting the latter value , we have the following relations GENERAL UNITS AND MEASURES . 21.
... * depend- ing upon the specific heat of water and the force of gravity . Everett's C. G. S. System of Units , 1891 Edit . , pp . 99-101 . Accepting the latter value , we have the following relations GENERAL UNITS AND MEASURES . 21.
Сторінка 22
... latter value , we have the following relations : 780 ft . - lbs . per lb. - deg . F. 428 kgm . - meters per kg . - deg . C. 4.2 Joules ( Watt - seconds ) per grm . - deg . C. 1404 ft . - lbs . per lb. - deg . C. 4.2 × 107 ergs per grm ...
... latter value , we have the following relations : 780 ft . - lbs . per lb. - deg . F. 428 kgm . - meters per kg . - deg . C. 4.2 Joules ( Watt - seconds ) per grm . - deg . C. 1404 ft . - lbs . per lb. - deg . C. 4.2 × 107 ergs per grm ...
Сторінка 26
... latter is a yellow substance - turpeth mineral — practi- cally insoluble in water ; its presence , at any rate in moderate quantities , has no effect on the cell . If , however , it be formed , the acid sulphate is also formed . This is ...
... latter is a yellow substance - turpeth mineral — practi- cally insoluble in water ; its presence , at any rate in moderate quantities , has no effect on the cell . If , however , it be formed , the acid sulphate is also formed . This is ...
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Electric Lighting: A Practical Exposition of the Art, for the Use of ..., Том 2 Francis Bacon Crocker Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
accumulator action advantage alternating current ampere ampere turns ampere-hours apparatus arc lamps armature arrangement battery belt boiler brushes carbon cast iron cause cell cent central stations centrifugal centrifugal force charge circuit coal coils commutator condensation conductors connected considerable consists construction copper core cylinder diameter direct coupling direct current direct-current discharge dynamo effect efficiency Elec electric lighting electric-lighting plant Electrical Engineer employed fact feet field-magnet flux fly-wheel force gas-engine governor heat horse-power incandescent lamps increase inductors insulation iron isolated plants latter Lightning-Arrester load machine machinery magnetic mechanical mercurous sulphate motor objectionable obtained ordinary piston plates pole-pieces practically pressure produced pulley reduced resistance revolutions per minute shaft short circuit short-circuited shown in Fig speed square inch steam steam-engine stroke sufficient sulphate supply surface switch temperature tion tubes turbine usually valve voltage volts weight wheel winding wire zinc zinc sulphate
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Сторінка 22 - As a unit of resistance, the international ohm, which 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 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
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Сторінка 23 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Сторінка 23 - ... As a unit of electromotive force, the international volt, which is 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...
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