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  1. Humans

    From the March 15, 1930, issue

    LARGEST BOILER One of the three largest boilers in the world is shown on the front cover. The boilers were recently installed in the East River station of the New York Edison Company to run the largest single-unit electric generator in the world. If this 215,000-horsepower turbo-generator had been developed in 1906, it could have […]

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  2. Materials Science

    Fridge Magnets and Chemistry

    Theres a tiger on your fridge! Lurking inside refrigerator magnets of the flat, flexible variety are magnetic-field stripes of alternating polarity. This University of Wisconsin Web site explains how fridge magnets work, shows how you can use such magnets to learn about magnetic force microscopy, and suggests experiments involving fridge magnets to model how metals […]

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  3. Math

    Whips and Dinosaur Tails

    The loud crack of a deftly flicked bullwhip can certainly command attention.