in which leading scientists speak in a programme edited by Professor E. N. da C. Andrade. F.R.S.
This week: ' Cosmic Rays,' by P. M. S. Blackett , F.R.S., Professor of Physics in the University of Manchester; 'The Heart as a Pump,' by C. A. Lovatt Evans , F.R.S., Professor of Physiology in the University of London