Energy in Nature Being With Some Additions the Substance of a Course of Six L
Energy in Nature Being With Some Additions the Substance of a Course of Six L
Carpenter, Wm. Lant (William Lant), 1841-1890
The book Energy in Nature Being With Some Additions the Substance of a Course of Six L was written by author Carpenter, Wm. Lant (William Lant), 1841-1890 Here you can read free online of Energy in Nature Being With Some Additions the Substance of a Course of Six L book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Energy in Nature Being With Some Additions the Substance of a Course of Six L a good or bad book?
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E. , offering less resistance remain comparatively cool. The principles of electric-lighting will be explained in the next chapter, since, as practi- cally carried out at present, they involve those questions of the relations between magnetism and electricity which will there be specially con- sidered. It will be sufficient to remark here that there are, broadly, two systems [1], the Arc system, in which the light is produced when the resistance opposed by two pieces of carbon ELECTRICITY. 109 ...(with a thin stratum of air between them) is introduced into the circuit; and [2], the Incan- descence, or glow, system, in which the necessary resistance is given by a continuous thin filament of carbon interposed in the circuit. It may be remarked here that neither system is as new as is generally supposed, the arc-light having been produced by Sir H. Davy three-quarters of a century ago, * and an incandescent carbon lamp having been publicly exhibited in Birmingham by Mr. W. Mattieu Williams more than thirty years ago ; in all such cases, however, the electrical energy was developed by chemical means, which were so costly as to prohibit the use of the light except for scientific experiments, and on occa- sions when expense was no object.
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