. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. Fig, 337.—Arc Lamp. 512 MACHINKRY FOR METALLIFEROUS Fig. Lamp. ends at the foot of an electric light pole in a Welsh quarry, the explanationof which was that owing to a stoppage of the dynamo the lamp hadgone out, and had been lowered by the night foreman, who ingeniouslyendeavoured to light it up again by the only means in his power. Incatidescent Lamps.—The pear-shaped glass globes within which isseen a thin horseshoe-shaped carbon filament, as in fig
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. Fig, 337.—Arc Lamp. 512 MACHINKRY FOR METALLIFEROUS Fig. Lamp. ends at the foot of an electric light pole in a Welsh quarry, the explanationof which was that owing to a stoppage of the dynamo the lamp hadgone out, and had been lowered by the night foreman, who ingeniouslyendeavoured to light it up again by the only means in his power. Incatidescent Lamps.—The pear-shaped glass globes within which isseen a thin horseshoe-shaped carbon filament, as in fig. 338, are nowso well known as to require but little are attached to small, round wooden sup-ports, on which are the terminals under whichthe ends of the conducting wires are supports also serve to hold a tin shadewhich reflects the light downwards. For house-hold purposes they can be arranged in a greatvariety of ornamental and artistic ways with which,however, we have not at present to deal. The life of an incandescent lamp dependsentirely upon the regularity of the current. Itsmaximum may be 2000 hours, but variations inthe speed, stop
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
