Dielectrics.- A. Introduction.- I. Definitions and concepts.- II. Problems of dielectric theory.- III. Electrostatic theorems.- B. The static dielectric constant.- I. Gases at low pressure.- a) Simplification of the problem.- b) Classical theory.- c) Quantum-mechanical theory.- d) Experimental results.- II. Dense gases and liquids.- a) The local-field method.- b) Simplified models.- c) Rigorous treatment of nonpolar molecules.- d) Rigorous treatment of polar molecules with no induced moment.- e) Polar molecules with induced moment.- III. Solutions.- a) Dilute solutions of polar molecules in nonpolar solvents.- b) Other topics.- IV. Solids.- V. Miscellaneous topics.- C. Behavior at optical frequencies.- I. Gases at low pressure.- II. Dense gases and condensed phases.- D. Dielectric loss.- I. Relaxation processes.- a) Phenomenological theory.- b) Molecular mechanisms.- c) Other mechanisms.- II. Resonance absorption.- E. Methods of measurement.- I. Methods for low and moderate frequencies.- II. Microwave methods.- F. Relation of dipole moments to molecular structure.- I. Conclusions based on polarity or nonpolarity.- II. Conclusions based on quantitative moment data.- Dielektrischer Durchschlag.- A. Historischer Überblick.- B. Wärmedurchschlag.- C. Rein elektrischer Durchschlag.- I. Grundprozesse der Leitungselektronen.- II. Theorie der Feldemission ins Vakuum.- III. Elektronenzustände des Isolator-Leitungsbandes im elektrischen Feld.- IV. Statistik der Elektronenübergänge.- V. Ausbildung des Durchschlags.- VI. Spezielle Materialien.- Literatur.- Piezoelectricity Electrostriction and Ferroelectricity.- A. General introduction.- B. Piezoelectricity.- I. Static conditions.- II. Dynamic conditions.- C. Piezoelectricity and electrostriction as tensors.- D. Changes of phase and crystal symmetry.- E. Macroscopic description of ferroelectricity and antiferroelectricity.- I. Ferroelectricity involving piezoelectric coupling.- II. Ferroelectricity involving electrostrictive coupling.- III. Thermodynamic potentials for piezoelectric and electrostrictive coupling.- IV. Antiferroelectricity.- F. Thermodynamics and phenomenological theory.- I. Phenomological theory and coefficients.- II. Measurement of free and completely clamped properties.- G. Statistical atomic theories of ferroelectricity.- I. Short range coupling predominant.- II. Local field coupling only.- III. Entropy and Curie constant.- General references.- Sachverzeichnis (Deutsch-Englisch).- Subject Index (English-German).