The outstanding chemical experiment of the year was performed last week at Minneapolis where the American Chemical Society was conducting its 78th annual meeting. Only a few score chemists witnessed the demonstration, and of those very few knew what it was all about.
Para-Hydrogen. Dr. K. F. Bonhoeffer, 30, timid, blond lecturer in chemistry at the Friedrich-Wilhelms University, Berlin, demonstrated that there are two kinds of hydrogen molecules. Around a glass tube filled with charcoal he poured liquid hydrogen which cooled the charcoal to almost absolute zero. Then through the frozen charcoal he...
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