The featured subject of the 1966 Denver X-Ray Conference was X-Ray Diffraction Topography and Dynamical X-Ray Phenomena. One of the chairmen of the featured ses? sions, Professor R. A. Young, made the following remarks at the conclusion of his session. We think they are quite appropriate to the occasion and with his permission we reproduce them here.The featured subject of the 1966 Denver X-Ray Conference was X-Ray Diffraction Topography and Dynamical X-Ray Phenomena. One of the chairmen of the featured ses? sions, Professor R. A. Young, made the following remarks at the conclusion of his session. We think they are quite appropriate to the occasion and with his permission we reproduce them here.X-Ray Diffraction Topography.- Contrast of Dislocation Images in X-Ray Transmission Topography.- The Asymmetric Bragg Reflection and Its Application in Double Diffractometry.- Experimental Determination of the Integrated Contribution of Temperature Diffuse Scattering in X-Ray Reflections.- The X-Ray Diffraction Image of a Stacking Fault.- Dynamical Theory for Simultaneous X-Ray Diffraction.- Measuring Techniques of Parallel-Beam-Diffraction Micrography.- Some Recent Applications of X-Ray Topography.- The Dilemma of Anomalous X-Ray Reflections.- X-Ray Diffraction Microscopy of Planar Diffused Junction Structures.- Experimental Procedures in X-Ray Diffraction Topography.- X-Ray Diffraction Contrast from Impurity Precipitates in CdS Single Crystals.- Lang X-Ray Topographic Studies of Ruby Grown by Different Methods.- The Analysis of Berg-Barrett Skew Reflections and Their Applications in the Observation of Process-Induced Imperfections in (111) Silicon Wafers.- The Effect of Small Additions of Magnesium on the Preprecipitation Behavior of Al-Zn Alloys.- Analysis of High Angle Diffuse Scattering from Small Platelets.- X-Ray Diffraction Study of Ordering in Two Sigma Phases.- A Study of the Unusual Line Structure in Powder Patterns of Pyrolytically Deposited Boron Compounds and Otl³