Advances in Magnetic Resonance, Volume 3, describes a number of important developments which are finding increasing application by chemists. The book contains five chapters and begins with a discussion of how the properties of random molecular rotations reflect themselves in NMR and how they show up, often differently, in other kinds of experiments. This is followed by separate chapters on the Kubo method, showing its equivalence to the Redfield approach in the cases of most general interest; the current state of dynamic nuclear polarization measurements in solutions and what they tell us about the interactions of molecules and about the frequency spectra of molecular motions; and insights into the structures of ferroelectric crystals and the nature of the transition to the ferroelectric state. The final chapter discusses spin temperatures and related matters.