This introduction to the principles of low-temperature engineering emphasizes the design and analysis of cryogenic systems. The new edition includes fresh material on superconductivity, liquid natural gas technology, rectification system design, refrigerators, and instrumentation. SI units are now used throughout the book. Unlike the previous edition, which was designed primarily as a college text, the new edition is written to serve as a professional reference as well, and is particularly useful for mechanical and chemical engineers involved in the design of cryogenic systems. Senior-level and graduate students interested in the fundamentals of cryogenic engineering will find this volume indispensable.