P. P. Ewald and his Dynamical Theory of X-ray Diffraction A Memorial Volume for Paul P. Ewald: 23 January 1888 - 22 August 1985

Paul Ewald's 1916-1917 masterpiece `On the Foundations of Crystal Optics' describes the selfconsistent interaction of electromagnetic waves with crystals on a molecular level. While astonishing in its detailed predictions for X-ray diffraction, full appreciation of the theory and its utility had to await much later advances in measurement techniques and crystal growth. Concepts introduced in the theory, now known as the Ewald sphere, Ewald summation, and Ewald-Oseen extinction, have become mainstays in diverse areas of modern physics. This memorial volume, with contributions by leading figures in the field, is an affectionate survey of his life, scientific work, and role in the international crystallographic community.

Introduction; N. Kato: The significance of Ewald's dynamical theory of diffraction; EWALD AS SEEN BY OTHERS: G. Hildebrandt: P.P. Ewald - The German period; H.A. Bethe & G. Hildebrandt; M.F. Perutz; D.C. Hodgkin: Paul Ewald in Cambridge and Belfast; H. Kamminga: Paul P. Ewald and the building of the crystallographic community; H.J. Juretschke: Paul P. Ewald - A personal appreciation; ASPECTS OF EWALD'S WORK AND THEIR LEGACIES; D.W.J. Cruickshank: The reciprocal lattice imbedded in Fourier space; D.H. Templeton: Lattice sums, the Madelung constant, and Paul Ewald; A. Authier & B. Capelle: X-ray topography; R. Colella: Multiple diffraction of X-rays and the phase problem; J.M. Cowley & A.F. Moodie: Paul Ewald and the dynamical theory of electron scattering; H.J. Juretschke: Commentary on Ewald's fundamental papers of the dynamical theory of X-ray diffraction; R.K. Bullough & F. Hynne: Ewald's optical extinction theorem; D. Ewald speaks for himself: Five key papers from 1913, 1968, 1969, 1979, and 1986; P.P. Ewald: Bibliography; Index.