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  • The Origins of Hypodermic Medication

    The injection of drugs is now taken for granted, but originally it was a bold innovation. The man who introduced the procedure some 120 years ago sought only to relieve the pain of neuralgia

    Norman Howard-Jones| January 1, 1971|

  • The Nature of Pulsars

    It is generally agreed that these flickering objects are neutron stars in rapid rotation. What seems to be such a star in the Crab Nebula may well account for some of the nebula's puzzling features

    Jeremiah P. Ostriker| January 1, 1971|

  • The Limitation of Offensive Weapons

    It is argued that the best possible outcome that can be expected to emerge from the current strategic-arms-limitation talks (SALT) would be a freeze on the existing offensive forces of both sides

    Herbert Scoville| January 1, 1971|

  • The Global Circulation of Atmospheric Pollutants

    Worldwide wind and temperature patterns and the behavior of trace substances are studied in an effort to learn what effect changes in the atmosphere caused by man may have on the earth's climate

    Reginald E. Newell| January 1, 1971|

  • Stress and Behavior

    The chain of pituitary and adrenal hormones that regulates responses to stress plays a major role in learning and other behaviors. It n1ay be that effective behavior depends on some optimum level of stress

    Seymour Levine| January 1, 1971|

  • Reflectors in Fishes

    Many fishes are able to secrete nitrogenous compounds that form mirror-like layers of reflective crystals. In the scales and the skin the layers are displays or camouflage; elsewhere they aid vision

    Eric Denton| January 1, 1971|

  • Induced Mutations in Plants

    The intentional exposure of seeds to mutagens has produced many new characteristics for the intensified breeding of plants. This procedure has played an important part in the “green revolution”

    Björn Sigurbjörnsson| January 1, 1971|

  • Circuit Breakers

    The problem is how to interrupt a high-voltage current quickly but not too quickly. The answer lies in cultivating and then quickly dousing the arc that forms when the circuit is broken

    Werner Rieder| January 1, 1971|

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