With a foreword by F. Dennette Adams. with a foreword by A. D. Baxter. With a foreword by R. H. Evans. With a foreword by W. E. Walters. With a foreword by Gordon Radley. With a foreword by E. D. Hughes. With a foreword by I. I. Rabi. With a foreword by L. E. Sutton. with a foreword by Peter Debye. With a foreword by E. J. Vaughan.