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Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916) Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 199
away fromthis position the illumination rapidly diminishes. Thealternating current arc gives a different distributionof light, the maximum amount of light being given Arc Lamps 195 out at angles of 40° above and below the horizontal.By the u^e of properly designed reflectors, the lightwhich is… … ©o- ao Figure 132 of a direct current lamp is done away with. (SeeFigure 132.) It is in a measure due to this betterdistribution of light that the alternating current hascome into such general use. In order to start any arc lamp it is necessary firstto bring the carbons together, so that the… Electrical engineering · Electric testing
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