Uncategorized

  1. Physics

    Oldest pitch-drop experiment

    The allure of pitch — a black tarlike hydro-carbon by-product of distilling petroleum, wood or coal — comes from its split personality: It shatters from a quick hit with a hammer, but flows if set aside for long periods.

    By Andrew Grant
  2. Health & Medicine

    Infant digestive problem more likely with formula

    Hypertrophic pyloric stenosis, which causes forceful vomiting, is more common in babies not breast-fed.

    By Nathan Seppa
  3. Agriculture

    Fertilizer has staying power

    Nitrogen-based fertilizer may remain in the soil for eight decades, complicating efforts to reduce pollution from runoff into rivers.

    By Gabriel Popkin
  4. Health & Medicine

    Seek Meningitis Vaccine

    Excerpt from the November 9, 1963, issue of SCIENCE NEWS LETTER.