PROF. R. C. L. BOSWORTH'S view, if I understand him properly, is that held by most physicists since the time of Boltzmann. It has become famous through Eddington's metaphor of the arrow of time. It ...

THE support given by Profs. Hill and Grünbaum in their interesting communication is very encouraging. The problem before us—before these two authors as well as before myself—is the clarification of ...