31 pp. Includes moire screen. CONTENTS: Moire Patterns in Everyday Life; The Moire Kit; Seeing Moire with Screens; The Simplest Case-Parallel Equispaced Lines; The General Approach to Moire Patterns; Interpretation of Moire Patterns in Terms of Projective Geometry; Application of the Moire Technique to Physics; Visual Psychology of Moire Effects; Appendix A. Overlapping the Equispaced Gratings; Appendix B. Focal Length Determination; Appendix C. Theory of the Screen Determiner; Appendix D. Overlapping on to a Variable Spaced Grating; Appendix E. Experiments with Calcite Crystals; References.
