Identifier: grandestcenturyi00nort (find matches)
Title: Grandest century in the world's history; containing a full and graphic account of the marvelous achievements of one hundred years, including great battles and conquests; the rise and fall of nations; wonderful growth and progress of the United States ... etc., etc
Year: 1900 (1900s)
Authors: Northrop, Henry Davenport, 1836-1909
Subjects: Nineteenth century
Publisher: Philadelphia, Pa., National publishing co
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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us of anybuilding consists in the lamps and afew wires. The lamp in its presentform is as .simple and as easily handledas a candle, and can be taken from itssocket and replaced even while the cur-rent is on. The construction of thissocket is shown in Fig. 4. The lamphas, attached to its electrodes, slips ofcopper which are bent up against thesides of the glass, touching two springsat opposite sides of the socket. One ofthese springs is connected with one ofthe electrical conductors; the othermerely touches the copper strip, and^does not form a part of the electricalconductor until it is touched by thethumb-screw, b^ this latter being con-nected with the second electrical con-ducting wire. To start the light it is 462 MARVELLOUS INVENTIONS AND DISCOVERIES. only necessary to turn the screw, b^till it touches the spring. To stop thelight the screw is turned in the reverse ^5. become one of the worlds great bene-factors. The use of the electric lighthas far exceeded the use of gas durino-
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Sdisons marvejIvIvOus incandescent lamp direction. From this it is obvious thatan electric lamp is more easily managedthan a gas burner, as it requires neitherlighting nor regulating; while it isequally plain that these lamps, havingwithstood the test of time, the inventorhas solved a profound problem, and the same period of time after the intro-duction of each. Many of the largestfactories and public buildings are nowlighted by electricity, and even in coun-try villages and towns everywhere theelectric light has been introduced intoprivate residences. The time is doubt- MARVELLOUS INVENTIONS AND DISCOVERIES. 468 less not far distant when it will be themeans for almost universal illumination.Electrical apparatus is constantly being perfected, and in no branch of sciencehave more rapid strides been made thanin this. RIFLES FIRED BY ELECTRICITY. The practice of firing big guns byelectricity is already well established,but hitherto no practical attempt hasbeen made to explode the shells

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