1969 marked the return of the Cryogenic Engineering Conference, now affiliated with the National Academy ofSciences through the Division ofEngineering, National Research Council, to the University of California at Los Angeles. As in 1962, the Cryogenic Engineering Conference gratefully acknowledges the assistance of UCLA, its Engineering and Physical Seien ces Extension Division, and in particular J. Dillon, S. Houston, H. L. Tallman, and their stafffor serving as hosts to the 1969 Cryogenic Engineering Conference. The National Academy of Sciences is a private honorary organization of more than 700 scientists and engineers elected on the basis of outstanding contributions to knowledge. Established by a Congressional Act of Incorporation, the Academy works to further science and its use for the general welfare by bringing together the most qualified individuals to deal with scientific and technological problems of broad significance. The National Research Council was organized as an agency of the National Academy of Sciences in 1916, to enable the broad community of U.S. scientists and engineers to associate their efforts with the Iimited membership of the Academy in service to science and the nation. The Division of Engineering is one of the eight major Divisions into which the National Research Council is organized for the conduct of its work. Its membership includes representatives of the nation's leading technical societies as weH as a number of members-at-Iarge. The Cryogenic Engineering Conference is an organization of the Division of Engineering.

Inhalt
LNG Technology.- A-1 Liquefied Natural GasA Broad Perspective.- A-2 Mixed Refrigerant Cascade Liquefiers for Natural GasDesign and Optimization.- A-3 Computer Simulation of Natural Gas Liquefaction Plant Processes.- A-4 Design Considerations for a Liquefied Natural Gas Pipeline.- Thermodynamic Properties.- B-1 The Vapor Pressure of Liquid Fluorine.- B-2 A Multipurpose Phase Equilibrium Apparatus to Study Mixtures of Cryogenic Fluids: Application to Argon-Methane.- B-3 Adsorption Kinetics in a Ternary System Containing Hydrogen.- B-4 The P-V-T Surface of Oxygen in the Critical Region; Densities of Saturated Liquid and Vapor.- Fluid and Solid Properties.- C-1 Thermal Conductivity Measurements on Fluid Hydrogen at 17 to 200°K and Pressures to 10 MN/m2.- C-2 Refractive Index of Liquid Deuterium.- C-3 Measurements of the Dielectric Constant of Saturated Liquid Oxygen.- C-4 The Dielectric Strength of Cryogenic Fluids and Solid Insulators.- C-5 Low-Temperature Electrical Resistivity of Some Engineering Alloys.- Mechanical Properties.- D-1 Tear Tests of 5083 Plate and of 5183 Welds in 5083 Plate and Extrusions.- D-2 Tensile Properties of Various Materials at Cryogenic Temperatures.- D-3 Cryostat and Strain Measurement for Tensile Tests to 1.5°K.- Superconductivity.- E-1 Magnetic Suspension and Guidance for High-Speed Trains by Means of Superconducting Magnets and Eddy Currents.- E-2 A Superconducting (Nb-Ti) Liquid Helium Level Detector.- E-3 The Design of a Rotating Dewar and Field Winding for a Superconducting Alternator.- Superconducting Magnets.- F-1 Construction of the 12-ft Bubble Chamber Superconducting-Magnet Cryostat.- F-2 Refrigeration Aspects of the ANL 12-ft Bubble Chamber Superconducting-Magnet System.- F-3 BIM, A Large 10-MJ Magnet.- F-4 The Design andOperation of an 88-kG 20-in.-Bore Superconducting Magnet System.- F-5 Performance Tests of 51-cm-Bore Superconductive Magnets for a Magnetic-Mirror Apparatus.- F-6 Force-Reduced Superconducting Toroidal Magnet Coils.- F-7 The Detection of Transitions in Superconducting Coils.- Heat Transfer.- G-1 Survey of Heat Transfer to Near-Critical Fluids.- G-2 Forced-Convection Heat Transfer to Nitrogen in the Vicinity of the Critical Point.- G-3 Heat Transfer to Freon-12 in the Near-Critical Regime.- G-4 Nucleate Boiling of Nitrogen, Argon, and Carbon Monoxide from Atmospheric to Near the Critical Pressure.- G-5 Transient Pool Boiling of Liquid Nitrogen Due to a Square-Wave Heat Flux.- G-6 Heat-Transfer Coefficient Measurements of Liquid Nitrogen Drops Undergoing Film Boiling.- G-7 Estimation of Film-Boiling Heat Transfer Coefficients for Cylindrical Heaters in Corresponding-States Fluids.- G-8 Saturated Film Boiling of Nitrogen from Atmospheric to the Critical Pressure.- G-9 Peak Heat Flux Density of Superfluid He II in Insulated Vertical Channels with Closed Ends and Wells.- G-10 Correlation of the Depth Effect on Film-Boiling Heat Transfer in Liquid Helium II.- G-11 Condensation Studies of Saturated Nitrogen Vapors.- G-12 Heat Exchanger Design for Rocket-Borne Cryogenic Air Samplers.- Insulation.- H-1 A Guarded Electrical Cylindrical Calorimeter for Measuring Thermal Conductivity of Multilayer Insulation.- H-2 An Analytical Model for Determining the Thermal Conductivity of Closed-Cell Foam Insulation.- H-3 Pressure Characteristics of Perlite Insulation in Double-Wall Tanks Under Repeated Thermal Cycling.- Fluid Dynamics.- I-1 Cooldown Flow Rate Limits Imposed by Thermal Stresses in Liquid Hydrogen or Nitrogen Pipelines.- I-2 Cooldown Transients in Cryogenic Transfer Lines.- I-3 A Time-Delay Analog for Thermal-Acoustic Oscillations.- I-4 Automatic Control of Flow Oscillations in Cryogenic Fluid Heat Exchangers.- I-5 Pressure Drop of Two-Phase Flow in a Pipeline with Longitudinal Variations in Heat Flux.- I-6 Slush Hydrogen Flow Characteristics and Solid Fraction Upgrading.- Gas Purification Systems.- J-1 300-scfm Helium Repurifier System.- J-2 High-Purity Products from an Air Separation Plant.- J-3 Rectisol: A Low-Temperature Scrubbing Process for Gas Purification.- Refrigeration Systems.- K-1 Applications of Helium to Very-Low-Temperature Refrigeration.- K-2 Simon Helium Liquefaction Method Using a Refrigerator and Thermal Valve.- K-3 Operation and Application of a Three-Stage Closed-Cycle Regenerative Refrigerator in the 6.5°K Region.- K-4 Low-Temperature Regenerator Test Apparatus.- K-5 Joule-Thomson Hydrogen Refrigerator Target.- K-6 Miniature Vuilleumier-Cycle Refrigerator.- Cryogenic Systems.- L-1 J-T Liquefaction of Hydrogen-Hydrocarbon Gas Mixtures.- L-2 Frost Formation on a Cylinder at Cryogenic Temperatures.- L-3 An Experimental Study of the Density of Cryodeposited Surfaces.- L-4 Preparation and Characterization of Slush Hydrogen and Nitrogen Gels.- Indexes.- Author Index.