The rapidly expanding use of very low temperatures in research and high technology during the last several decades and the concurrent high degree of activity in cryogenic engineering have mutually supported each other, each improvement in refrigeration technique making possible wider oppor­ tunities for research and each new scientific discovery creating a need for a refrigerator with special features. In this book, Professor Walker has provided us with an excellent exposition of the achievements of this period, the fundamental principles involved, and a critical examination of the many different cryogenic systems which have led to a new era of low-level refrigeration. I feel fortunate to have had a part in the developments discussed in this book. During the early 1930s I constructed several rotary engines using leather vanes. Their performance was not good, but I was able to liquefy air. I had been impressed by the usefulness of leather cups in tire pumps and in Claude-type engines for air liquefaction. I was trying to find a way to avoid that part of the friction generated by a leather cup as a result of the radial force of the working gas on the cylindrical part of the cup. During the 1950s I built two efficient helium liquefiers in which essentially leather pistons were used.

Product Description: Provides a philosophical and critical analysis of F.A. Hayek's version of Classical Liberalism. Highlighting weaknesses of the agnostic, evolutionary ethics that Hayek, a recipient of the Nobel Prize in Economics, considers foundational to his free-market system, the study explores alternative moral foundations within Christian ethics...read more

Product Description: Written by the most well known face of India's IT literacy movement, this book is designed for the first course in C# taken by undergraduate students in Computers and Information Technology. The revised edition maintains the lucid flow and continuity which has been the strength of the book...read more

This is a history of the development of the Ulster Unionist Party from its beginnings in the opposition to Irish Home Rule to the present day. It outlines why the Ulster Unionist Party is so central to efforts to reach a settlement of the Northern Ireland political problem.

Product Description: Key Concepts in Sport Psychology provides a focused, accurate guide for students working within the dynamic field of sport psychology.The concise and authoritative entries have been selected by experienced teachers and researchers; each one defines, explains and develops a key topic in sport psychology acting as a springboard for further reading and debate...read more

Product Description: Rangers have won 53 League Championships, more than any other club in the world. They have won the Scottish League Cup 26 times -- more than any other Scottish club -- and the Scottish Cup 33 times. In 1961 Rangers reached the final of the European Cup Winners' Cup, becoming the first British club to reach the final of a UEFA club competition...read more

Product Description: A collection of essays by leading historians and sociologists on the importance of sport in the history of Scottish culture. Scotland, they agree, can be better understood through studying its sport and popular culture. Their wide-ranging study encompasses the historical and the contemporary, the male and the female, the royal and the commoner, the middle class and working class aspects of Scottish sport, as well as the role of the media and the churches in the generation of national sporting myths...read more

Product Description: Rangers Football Club, "The Sunday Post" and the Orange Order are the modern outlets for a Protestantism that in the past has been seen to characterize Lowland Scotland and provide the motivating force behind many of Scotland's most outstanding men and women...read more

Product Description: Provides an up-to-date reference on the technology, history, and practical applications of Stirling engines, including recent developments in the field and a convenient survey of literature on the Stirling engine.

Product Description: The Stirling Engine Book