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The discovery of the element helium was made just 100 years ago in 1868. Today helium is produced in large quantities and used in many technological applications. This treatise is a source document containing information on helium resources, production, conservation, thermodynamic properties, liquefaction and refrigeration techniques, transportation and storage of liquid and safety requirements. It also contains a discussion of uses for liquid and cold gas in cryoelectronics, superconductivity, bubble chambers, cryopumping and missile and space systems. The book brings together articles by noted authorities in cryogenic technology in which they discuss their specialized field in great depth