"Uses single crystals of sodium chloride and quartz to show typical properties of crystals. Compares cleavage, melting point, and models of crystals with those of glasses. Illustrates the use of X-rays to determine the structure of crystals, showing the diffraction of X-rays by a crystal of sodium chloride on a fluorescent screen. Uses the diffraction of water waves in a ripple tank to show how the Bragg equation allows the determination of interatomic distances in crystals." - Summary from Worldcat.