Electrical Engineer, Volume 11Electrical Engineer., 1891 |
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alternating current ammeter amperes apparatus arc lamps armature arrangement binding posts boiler Boston brushes cable candle power capacity carbon carried cell cent central station charge Chicago circuit coils commutator condenser conductors connected construction copper cut-out Davenport deflection designed device diameter discharge dynamo Edison Elec Electric Company electric light electric motor electric railway ELECTRICAL ENGINEER electro-magnetic electromotive force employed experiments fact feet Filed galvanometer gear give heat incandescent lamps inches increase induction instrument insulation interest invention iron large number machine manufacture means mechanical metal method miles obtained operation patent placed plant plate pole position practical present president pressure Prof rail railroad rapid transit resistance road shaft short circuit shown shunt speed steam storage battery street railway supply switch telegraph telephone Thomas Davenport Thomson Thomson-Houston tion track tube underground volts Wenstrom wheel York
Popular passages
Page 223 - When pieces of charcoal about an inch long and one-sixth of an inch in diameter were brought near each other (within the thirtieth or fortieth of an inch), a bright spark was produced, and more than half the volume of the charcoal became ignited to whiteness; and, by withdrawing the points from each other, a constant discharge took place through the heated air, in a space equal to at least four inches, producing a most brilliant ascending arch of light, broad and conical in form in the middle.
Page xii - I never myself attempted to reduce these principles to practice, or to apply any of my discoveries to processes in the arts. My whole attention, exclusive of my duties to the college, was devoted to original scientific investigations, and I left to others what I considered in a scientific view of subordinate importance the application of my discoveries to useful purposes in the arts. Besides this, I partook of the feeling common to men of science, which disinclines them to secure to themselves the...
Page 333 - ... that in every such subject within its appellate jurisdiction the circuit court of appeals at any time may certify to the Supreme Court of the United States any questions or propositions of law concerning which it desires the instruction of that court for its proper decision.
Page xii - Not much importance, however, is attached to the invention, since the article, in its present state, can only be considered a philosophical toy; although, in the progress of discovery and invention, it is not impossible that the same principle, or some modification of it on a more extended scale, may hereafter be applied to some useful purpose.
Page 250 - Who can but admire the hardihood of invention which devised such very slight means to realize the mathematical conception that, if electricity is to convey all the delicacies of quality which distinguish articulate speech, the strength of its current must vary continuously, and, as nearly as may be, in simple proportion to the velocity of a particle of air engaged in constituting the sound...
Page 114 - THE president of the Board of Trade has appointed a committee to consider and report what steps should be taken, whether by legislation or otherwise, to ensure that there shall be an adequate and economical supply of electric power for all classes of consumers in the United Kingdom, particularly industries which depend upon a cheap supply of power for their development.
Page 253 - ... given to cities and towns with safety and advantage, not only as a relief to the Legislature, but as a just and proper extension of local self-government. I therefore commend to your consideration the subject of enlarging their powers by general laws, especially in matters of taxation, franchises, municipal control of municipal work, and ownership of the instrumentalities for its performance.
Page 124 - ... justify the expectation that we are on the eve of mechanical discoveries still greater than any which have yet appeared; and that the steam...
Page 37 - European species which infests many different plants, and it is spread throughout our country from the Atlantic to the Pacific, and from the Great Lakes to the Gulf of Mexico.
Page 198 - IT has long been known that certain substances enclosed in a vacuous glass bulb phosphoresce brightly when submitted to molecular bombardment from the negative pole of an induction coil. The ruby, emerald, diamond, alumina, yttria, samaria and a large class of earthy oxides and sulphides emit light under these circumstances. Examined in a spectroscope the light from some of these bodies gives an almost continuous spectrum, while that from others, such as alumina, yttria and samaria, gives spectra...