Vacuum Technology Transactions covers the proceedings of the Sixth National Symposium on Vacuum Technology Transactions, held in Philadelphia on October 7-9, 1959, sponsored by the American Vacuum Society. This book is organized into eight parts encompassing 57 chapters. The opening part deals with the important role of spectroscopic studies in vacuum science, particularly in ultra-high-vacuum investigations. The next parts describe the production, design, and requirements of ultra-high-vacuum systems; methods of measurement and applications of vacuum systems; and the application of vacuum te