How Guglielmo Marconi telegraphs without wires.—Santos-Dumont and his air-ship.—How a fast train is run.—How automobiles work.—The fastest steamboats. —The life-savers and their apparatus.—Moving pictures; some strange subjects and how they were taken.—Bridge builders and some of their achievements.—Submarines in war and peace.—Long-distance telephony; what happens when you talk into a telephone receiver.—A machine that thinks; a type-setting machine that makes mathematical calculations.—How heat produces cold; artificial ice-making.
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