Theoretical Advances.- Specific Kerr Constants of Rigid, Ellipsoidal Macromolecules in Conducting Solution at Very Low Ionic Strength.- Transient Electric Birefringence of Macromolecular Solutions at Reversing Fields of Arbitrary Strength and Duration.- The Limit of the Numerical Method of Inverting the Laplace Transformation and the Uniqueness of Relaxation Distribution Function Obtained by the Method.- Low Angle Approximations to the Theory of Alternating Electric Field Light Scattering.- A Theory of Dynamic Light-Scattering by Flexible Macromolecules in a Fluctuating Electric Field.- Electro-Optical Responses of Chiral Substances.- Absorption Phenomena.- An Instrument for the Measurement of Electric Dichroism.- Simultaneous Measurement of Dichroism and Birefringence on Suspensions of Absorbing Particles.- Electric Dichroism of Purple Membrane.- Electrochromism of Organic Dyes in Polymer Matrices.- Electrically Induced Fluorescence Changes from Solutions of Dye Tagged Polyribonucleotides.- Polarized Fluorescence in an Electric Field: Theoretical Calculation at Arbitrary Fields. Experimental Comparison with Other Electrooptical Effects. Saturation of the Induced Dipole Moment in Polyelectrolytes.- Nucleic Acids and Polynucleotides.- Dielectric Properties of Low-Molecular Weight DNA in Aqueous Solutions at Low Ionic Strength.- Electro-Optic Measurement of ?-ray Induced Damage in DNA.- Physical Studies of Hg(ll) and Ag(l) DNA Complexes — Theory.- Electric-Field Induced Orientation of Polynucleotides.- The Stabilized Induced Dipole in Solutions of Polynucleotides.- Biological Systems.- Electro-Optical Properties of Nucleosomes and Nucleosomal DNA.- Polarisability Anisotropy as an Indicator of the Effects of Aminoglycoside Antibiotics on Sensitive, Dependent andResistant Strains of E. coli.- Rotational Diffusion Coefficients of Complex Macromolecules.- Determination of Rotational Diffusion Coefficients of the Bacteriophages T4B and T7 by Depolarized Dynamic Light Scattering. The Influence of Double Scattering.- Effects of Calcium and ATP on the Conformation of F-Actin in Vivo and In Vitro.- Electric Birefringence of Cartilage Proteoglycan and its Association with Hyaluronic Acid.- An Electrical Birefringence Study of the Contribution of Permanent and Induced Dipole Moments to Acid-Soluble Collagen Polarization.- Polyelectrolytes and Polymers.- Electro-Optical Changes in Biopolymers — Chemical and Rotational Contributions.- Reversal of Birefringence Sign of Natural and Synthetic Polyelectrolytes in the Presence of Metal Cations and Coordination Complexes.- Electro-Optic Study of the Conformational Changes Induced in Partially Charged Poly-4-Vinylpyridine by Ions of Heavy Metals.- Kerr Constants of Naturally-Occurring ?-Amino Acids in Aqueous Solution.- A Bridge Method for Measuring the Dielectric Relaxation of Conducting Solutions.- Photoconductivity and Dielectric Properties of Polyhexamethylene Adipamide.- Colloidal Systems.- Electro-Optic Studies of Colloids and their Stability.- Size Distributions of Rigid Colloids from Transient Birefringence Data.- Length Dependence of the Ionic Contribution to the Anisotropy of the Electrical Polarisability for Rigid Rods.- Flow Alignment of a Colloidal Solution Which Can Undergo a Transition from the Isotropic to the Nematic Phase (Liquid Crystal).- Quasi-Crystals Produced By Colloidal Photochrome Dyes in an Applied Electric Field.- Effect of CTAB on Colloidal Suspensions of Sepiolite — A Study by Light Scattering, Electric Birefringence, Laser Line Broadening and ElectrophoreticLight Scattering.- Laser and High Field Effects.- Some Evidences for a Conformational Change of Polypeptide Induced by Strong Electric Fields.- Nonlinear Dielectric Effect of PBLG in Nonpolar Medium.- Laser and Electric Field Induced Kerr Effect Studies on Nematic Liquid Crystals.- Slow Non-Critical Molecular Reorientation in the Isotropic Phases of Nematogens.- A Comparison of Optico-Optical Scattering and Birefringence Measurements on Wyoming Sodium Bentonite Suspensions.- Laser Photoinduced Changes in the High Frequency Dielectric Constant of Chloroplasts and Dyes.- Relation Between Electric Field-Induced Optical Rectification and Electro-Optic Kerr Effect in Macromolecular Solutions.