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 7
... cent ; or , in other words , the price for central - station incandescent lighting is between one - half and one cent all over the world . This is equivalent to ordinary illuminating - gas at one to two dollars per thousand cubic feet ...
... cent ; or , in other words , the price for central - station incandescent lighting is between one - half and one cent all over the world . This is equivalent to ordinary illuminating - gas at one to two dollars per thousand cubic feet ...
Сторінка 20
... cent . MEASURES OF LENGTH . APPROX . ACTUAL LOGARITHM . VALUE . NUMBER . Millimeters in one inch Centimeters in one inch 25 25.4 1.4048 34 · 23 2.54 .4048 34 Centimeters in one foot 303 30.48 1.4840 15 Meters in one foot . I ' .30480 ...
... cent . MEASURES OF LENGTH . APPROX . ACTUAL LOGARITHM . VALUE . NUMBER . Millimeters in one inch Centimeters in one inch 25 25.4 1.4048 34 · 23 2.54 .4048 34 Centimeters in one foot 303 30.48 1.4840 15 Meters in one foot . I ' .30480 ...
Сторінка 22
... Cent . , and is called the gram - calorie . ELECTRICAL UNITS . Formerly the electrical units were defined somewhat abstractly , and there were considerable discrepancies between the various determinations of the ohm . The result was ...
... Cent . , and is called the gram - calorie . ELECTRICAL UNITS . Formerly the electrical units were defined somewhat abstractly , and there were considerable discrepancies between the various determinations of the ohm . The result was ...
Сторінка 25
... cent by weight of the zinc sulphate crystals , to neutralize any free acid . The crystals should be dissolved with the aid of gentle heat , but the temperature to which the solution is raised must not exceed 30 ° C. Mercurous sulphate ...
... cent by weight of the zinc sulphate crystals , to neutralize any free acid . The crystals should be dissolved with the aid of gentle heat , but the temperature to which the solution is raised must not exceed 30 ° C. Mercurous sulphate ...
Сторінка 31
... cent lighting ; and this is also an advantage for temporary instal- lations , since it avoids the necessity for very fine machinery , or careful setting and adjustment of the same . Alternating and Direct Currents . The third ...
... cent lighting ; and this is also an advantage for temporary instal- lations , since it avoids the necessity for very fine machinery , or careful setting and adjustment of the same . Alternating and Direct Currents . The third ...
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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 24 - It is nearly filled with the solution, and connected to the rest of the circuit by being placed on a clean copper support to which a binding screw is attached.