by D.J. Finney ;with a foreword by F. Tattersfield. by A.G. Warren ; with a foreword by Alexander Russell. by F. C. Orchard, with a foreword by H. C. Harland. by Ivor Jenkinsm,with a foreword by C. J. Smithells. by W.V.D. Hodge ; with a foreword by Michael Atiyah. by A. R. Stokes. With a foreword by Sir John Randall. by Sydney F. Page ; with a foreword by W. E. Walters. by H.J.J. Braddick ; With a foreword by P. M. S.Blackett. by B. J. Chalmers. With a foreword by T. H. Mason. by J.S. Marsh ; with a foreword by John Johnston.