Washington last week caught up with Leyden, Berlin and Toronto in the matter of liquefying helium (after hydrogen most volatile of gases) and keeping it liquida scientific feat first accomplished 23 years ago. The jubilant men who did it were staff members of the U. S. Bureau of StandardsDrs. George Kimball Burgess (director), Hobert Cutler Dickinson and Ferdinand Graft Brickwedde and two aides. In cylinders stout enough to withstand the tremendous expansion of gases they compressed air to liquid ( 310º F.). Liquid air helped liquefy hydrogen ( 432.4º F.); liquid...
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