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  • Unknown Viruses

    In Africa and South America investigators discovered 11 Viruses not identified with any disease. These are now studied because they are potentially dangerous and shed light on the behavior of all viruses

    George W. Gray| March 1, 1955|

  • The Growth of Crystals

    How do atoms or molecules in a vapor or solution form the regular architecture of a solid? Much can be explained by the assumption that they fall into place rather like the bricks laid in a spiral ramp

    Robert L. Fullman| March 1, 1955|

  • The Curtain Wall

    The walls of a large building once had to support their own weight; today they are hung from a skeleton. They are susceptible to further specialization to preserve the internal environment of the building

    James Marston Fitch| March 1, 1955|

  • The Continental Shelf

    Around the borders of the continents the bottom of the ocean slopes off gently for as much as 400 miles before it plunges into the deeps. This terrace provides an active natural laboratory for the geologist

    Henry C. Stetson| March 1, 1955|

  • Radio Telescopes

    Their evolution accelerates the pace of astronomy. One now being built will have a reflector 250 feet across. Another proposed here would have a main antenna 2,000 feet long and 200 feet high

    John D. Kraus| March 1, 1955|

  • How People Interact in Conferences

    In which talk is subjected to formal observation and analysis. A sample finding of the investigation: The average conference group has dual leaders, an "idea man" and a "best-liked man"

    Robert F. Bales| March 1, 1955|

  • History of a Dig

    How does an archaeologist decide where to excavate, and exactly how does his work proceed? These questions are answered in terms of the digging at a single site: Cerro Culebra on the coast of Peru

    Louis M. Stumer| March 1, 1955|

  • Birds as Flying Machines

    A sequel to the article on the aerodynamics of birds in the April, 1952, issue of this magazine. Among the remarkable adaptations birds have made to life in the air are high power and light weight

    Carl Welty| March 1, 1955|

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