Fritz London Award Address -- Light Scattering As a Probe of Liquid Helium -- Phase Diagram of Helium Monolayers -- Helium-3 in Superfluid Helium-4 -- Some Recent Developments Concerning the Macroscopic Quantum Nature of Superfluid Helium -- A Neutron Scattering Investigation of Bose-Einstein Condensation in Super-fluid 4He -- Temperature and Momentum Dependence of Phonon Energies in Superfluid 4He -- Does the Phonon Spectrum in Superfluid 4He Curve Upward? -- Model Dispersion Curves for Liquid 4He -- Analysis of Dynamic Form Factor S(k, ?) for the Two-Branch Excitation Spectrum of Liquid 4He -- Excitation Spectrum for Weakly Interacting Bose Gas and the Liquid Structure Function of Helium -- Elementary Excitations in Liquid Helium -- Long-Wavelength Excitations in a Bose Gas and Liquid He II at T = 0 -- Bose-Einstein Condensation in Two-Dimensional Systems -- Phonons and Lambda Temperature in Liquid 4He as Obtained by the Lattice Model -- Equation of State for Hard-Core Quantum Lattice System -- Impulse of a Vortex System in a Bounded Fluid -- New Results on the States of the Vortex Lattice -- Superfluid Density in Pairing Theory of Superfluidity -- The 3He-Roton Interaction -- Quantum Lattice Gas Model of 3He-4He Mixtures -- The S = 1 Ising Model for 3He-4He Mixtures -- Low Temperature Thermodynamics of Fermi Fluids -- Density and Phase Variables in the Theory of Interacting Bose Systems -- Subcore Vortex Rings in a Ginsburg-Landau Fluid -- Multilayer Helium Films on Graphite -- Submonolayer Isotopic Mixtures of Helium Adsorbed on Grafoil -- Spatial Ordering Transitions in Quantum Lattice Gases -- A Model of the 4He Monolayer on Graphite -- Thermal Properties of the Second Layer of Adsorbed 3He -- Nuclear Magnetic Resonance Investigation of 3He Surface States in Adsorbed 3He-4He Films -- Nuclear Magnetic Relaxation of Liquid 3He in a Constrained Geometry -- Low-Temperature Specific Heat of 4He Films in Restricted Geometries -- Mean Free Path Effects in 3He Quasiparticles: Measurement of the Spin Diffusion Coefficient in the Collisionless Regime by a Pulsed Gradient NMR Technique -- Adsorption of 4He on Bare and on Argon-Coated Exfoliated Graphite at Low Temperatures -- Ellipsometric Measurements of the Saturated Helium Film -- Momentum and Energy Transfer Between Helium Vapor and the Film -- Nuclear Magnetic Resonance Study of the Formation and Structure of an Adsorbed 3He Monolayer -- Pulsed Nuclear Resonance Investigation of the Susceptibility and Magnetic Interaction in Degenerate 3He Films -- Measurements and Calculations of the Helium Film Thickness on Alkaline Earth Fluoride Crystals -- The Normal Fluid Fraction in the Adsorbed Helium Film -- Helium II Film Transfer Rates Into and Out of Solid Argon Beakers -- Preferred Flow Rates in the Helium II Film -- Superfluidity of Thin Helium Films -- Superfluidity in Thin 3He-4He Films -- On the Absence of Moderate Velocity Persistent Currents in He II Films Adsorbed on Large Cylinders -- Thermodynamics of Superflow in the Helium Film -- Mass Transport of 4He Films Adsorbed on Graphite -- Helium Film Flow Dissipation with a Restrictive Geometry -- Dissipation in the Flowing Saturated Superfluid Film -- Dissipation in Superfluid Helium Film Flow -- Direct Measurement of the Dissipation Function of the Flowing Saturated He II Film -- Application of the Fluctuation Model of Dissipation to Beaker Film Flow -- Film Flow Driven by van der Waals Forces -- Decay of Saturated and Unsaturated Persistent Currents in Superfluid Helium -- Rotating Couette Flow of Superfluid Helium -- New Aspects of the ?-Point Paradox -- Torque on a Rayleigh Disk Due to He II Flow -- Superfluid 4He Velocities in Narrow Channels between 1.8 and 0.3°K -- Critical Velocities in Superfluid Flow Through Orifices -- Observations of the Superfluid Circulation around a Wire in a Rotating Vessel Containing He II -- An Attempt to Photograph the Vortex Lattice in Rotating He II -- Radial Distribution of Superfluid Vortices in a Rotating Annulus -- Effect of a Constriction on the Vortex Density in He II Superflow -- AC Measurements of a Coupling between Dissipative Heat Flux and Mutual Friction Force in He II -- The He II-He I Transition in a Heat Current -- Pumping in He II by Low-Frequency Sound -- Optical Measurements on Surface Modes in Liquid Helium II -- Measurement of the Temperature Dependence of the Density of Liquid 4He from 0.3 to 0.7°K and Near the ?-Point -- Second-Sound Velocity and Superfluid Density in 4He Under Pressure and Near T? -- Superfluid Density Near the Lambda Point in Helium Under Pressure -- Hypersonic Attenuation in the Vicinity of the Superfluid Transition of Liquid Helium -- Superheating in He II -- Evaporation from Superfluid Helium -- Angular Distribution of Energy Flux Radiated from a Pulsed Thermal Source in He II below 0.3°K -- Electric Field Amplification of He II Luminescence Below 0.8°K -- Correlation Length and Compressibility of 4He Near the Critical Point -- Coexistence Curve and Parametric Equation of State for 4He Near Its Critical Point -- Effect of Viscosity on the Kapitza Conductance -- Liquid Disorder Effects on the Solid He II Kapitza Resistance -- The Kapitza Resistance between Cu (Cr) and 4He (3He) Solutions and Applications to Heat Exchangers -- Heat Transfer between Fine Copper Powders and Dilute 3He in Superfluid 4He -- Thermal Boundary Resistance between Pt and Liquid 3He at Very Low Temperatures -- The Leggett-Rice Effect in Liquid 3He Systems -- Helium Flow Through an Orifice in the Presence of an AC Sound Field -- Vortex Fluctuation Contribution to the Negative Ion Trapping Lifetime -- The Question of Ion Current Flow in Helium Films -- Impurity Ion Mobility in He II -- Measurement of Ionic Mobilities in Liquid 3He by a Space Charge Method -- Pressure Dependence of Charge Carrier Mobilities in Superfluid Helium -- Two-Dimensional Electron States Outside Liquid Helium -- An Experimental Test of Vinen's Dimensional Theory of Turbulent He II -- Measurements on Ionic Mobilities in Liquid 4He -- Influence of a Grid on Ion Currents in He II -- Collective Modes in Vortex Ring Beams -- Tunneling from Electronic Bubble States in Liquid Helium Through the Liquid -Vapor Interface -- Positive Ion Mobility in Liquid 3He -- A Large Family of Negative Charge Carriers in Liquid Helium -- Temperature Dependence of the Electron Bubble Mobility Below 0.3° K -- Transport Properties of Electron Bubbles in Liquid He II -- Do Fluctuations Determine the Ion Mobility in He II near T?? -- Absence of a Quadratic Term in the 4He Excitation Spectrum -- Theoretical Studies of the Propagation of Sound in Channels Filled with Helium II -- Developments in the Theory of Third Sound and Fourth Sound -- Thermal Excitation of Fourth Sound in Liquid Helium II -- Inelastic Scattering From Surface Zero-Sound Modes: a Model Calculation -- The Scattering of Low-Energy Helium Atoms at the Surface of Liquid Helium -- Inelastic Scattering of 4He Atoms by the Free Surface of Liquid 4He -- The Scattering of Light by Liquid 4He Close to the ?-Line -- Experiments on the Scattering of Light by Liquid Helium -- Brillouin Light Scattering from Superfluid Helium under Pressure -- Brillouin Scattering from Superfluid 3He-4He Mixtures -- Liquid Structure Factor Measurements on the Quantum Liquids -- The Functional Forms of S(k) and E(k) in He II as Determined by Scattering Experiments -- Effective Viscosity of Liquid Helium Isotope Mixtures -- The Viscosity of Dilute Solutions of 3He in 4He at Low Temperatures -- The Viscosity of 3He-4He Solutions -- Thermodynamic Properties of Liquid 3He-4He Mixtures Near the Tricritical Point Derived from Specific Heat Measurements -- Dielectric Constant and Viscosity of Pressurized 3He-4He Solutions Near the Tricritical Point -- Critical Opalescent Light Scattering in 3He-4He Mixtures Near the Tricritical Point -- Second-Sound Velocity, Gravitational Effects, Relaxation Times, and Superfluid Density Near the Tricritical Point in 3He-4He Mixtures -- Excitation Spectrum of 3He-4He Mixture and Its Effect on Raman Scattering -- The Low-Temperature Specific Heat of the Dilute Solutions of 3He in Super-fluid 4He -- Spin Diffusion of Dilute 3He-4He Solutions under Pressure -- The Spin Diffusion Coefficient of 3He in 3He-4He Solutions -- Nucleation of Phase Separation in 3He-4He Mixtures -- Renormalization of the 4He ?-Transition in 3He-4He Mixtures -- The Osmotic Pressure of Very

Dilute 3He-4He Mixtures -- Pressure Dependence of Superfluid Transition Temperature in 3He-4He Mixtures -- Thermal Diffusion Factor of 3He-4He Mixtures: A Test of the Helium Interaction Potential -- Peculiarities of Charged Particle Motion in 3He-4He Solutions in Strong Electric Fields -- First-Sound Absorption and Dissipative Processes in 3He-4He Liquid Solutions and 3He -- of Other Volumes -- Index to Contributors.