The Electrical EngineerBiggs & Company, 1890 - Electrical engineering |
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accumulators alternating currents amount ampere-hours amperes antimony apparatus application arc lamps armature arrangement battery Board of Trade boiler brass Brush Brush Electrical cable carbon carried cells cent central station charge circuit coils committee conductor connected construction copper core cost curve direction Directors discharge dividend dynamo effect efficiency electric conductors electric light electric motor Electric Supply ELECTRICAL ENGINEER electrolyte electromagnet energy exhibition experiments Fleet Street galvanometer heat hysteresis Improvements in electric incandescent increase installation instrument insulation iron Lineff London machine magnetic magnetisation means meeting ment mercury Messrs metal method miles motor obtained ohms ordinary paper patent placed plates poles position practical pressure Prof provisional order rail railway resistance rotation running shares Southampton-buildings steam steel street surface switches Telegraph telephone temperature tion town traction tramway United voltmeter volts Watt-hours watts wire
Popular passages
Page 120 - Whenever the company has passed an extraordinary resolution to the effect that it has been proved to their satisfaction that the company cannot by reason of its liabilities continue its business and that it is advisable to wind up the same...
Page 171 - unit" shall mean the energy contained in a current of one thousand amperes flowing under an electromotive force of one volt during one hour.
Page 160 - He found that the passage of an electric current directly through the milk not only did not hasten, but actually delayed acidulation, milk so treated not becoming sour until from the sixth to the ninth day, whereas milk not so electrified became markedly acid on the third day. When, however ,'the surface of a quantity of milk was brought close under the two balls of a Holtz machine the milk soon became sour, and this effect he...
Page 263 - A round piece of iron about one-quarter of an inch in diameter was bent into the usual form of a horse-shoe, and instead of loosely coiling around it a few feet of wire, as is usually described, it was tightly wound with 35 feet of wire covered with silk, so as to form about 400 turns; a pair of small galvanic plates which could be dipped into a tumbler of diluted acid, was soldered to the ends of the wire, and the whole mounted on a stand. With these small plates the horseshoe became much more powerfully...
Page 190 - I continued six years very happy with a liberal, friendly, and harmonious congregation, to whom my services (of which I was not sparing) were very acceptable. Here I had no unreasonable prejudices to contend with, so that I had full scope for every kind of exertion ; and I can truly say that I always considered the office of a Christian minister as the most honourable of any upon earth, and in the studies proper to it I always took the greatest pleasure.
Page 322 - When the fixed and movable plates are connected respectively to two points of an electric circuit, between which there exists a difference of potential, the movable plate tends to move so as to augment the electrostatic capacity of the instrument, and the magnitude of the force concerned in any case is proportional to the square of the difference of potential by which it is produced.
Page 277 - In describing the results of my experiments, the terms intensity and quantity magnets were introduced to avoid circumlocution, and were intended to be used merely in a technical sense. By the intensity magnet I designated a piece of soft iron, so surrounded with wire that its magnetic power could be called into operation by an...
Page 264 - From a series of experiments with this and other magnets it was proved that, in order to produce the greatest amount of magnetism from a battery of a single cup, a number of helices is required ; but when a compound battery is used, then one long wire must be employed, making many turns around the iron, the length of wire, and consequently the number of turns, being commensurate with the projectile power of the battery. "In describing the results of my experiments the terms intensity and quantity...
Page 235 - ... powers; much of which depends upon the manner of treatment at the forge, as well as upon the natural character of the iron itself*. The superlative intensity of electro-magnets, and the facility and promptitude with which their energies can be brought into play, are qualifications, admirably adapted for their introduction into a variety of arrangements in which powerful magnets so essentially operate, and perform a distinguished part in the production of electro-magnetic rotations...
Page 234 - An unparalleled transiliency of magnetic action is also displayed in soft iron by an instantaneous transition from a state of total inactivity to that of vigorous polarity, and also by a simultaneous reciprocity of polarity in the extremities of the bar — versatilities in this branch of physics for the display of which soft iron is pre-eminently...