The Conference timetable had to be so arranged as to spread the main topics over several separate sessions. It was therefore decided to publish the material in these Proceedings under nine subject headings, irrespective of session. Within each chapter, which is preceded by a list of the sessions featuring the subject, all papers, invited and contributed, whether presented at the Conference or accepted for publication only, have been arranged in some lo gical order. The reports of the four Panel Discussions were edited or summarized by the respective Moderator in consultation with Panel Members. In one instance, shortened versions of the Introductory Papers precede the discussion. Where possible, verbatim accounts of the often lively exchanges have been retained. The customary catalogue of high-energy acceler ators has been published separately. The continuing world-wide activities in accelerator research, witl1 its ever larger pro jects, are reflected by the numerous contributions accepted for inclusion in these Proceedings, which have reached the limit of what a single volume can manageably contain, while making rapid publication even harder to achieve. All the more reason to extend the gratitude of all con cerned to those involved in the chain of production: - To the authors, for their prompt handing-in or timely posting of their papers. Thanks also to their secretaries who followed the guidelines for the presentation of camera-ready copy.

Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

A union list of serials commencing publication after Dec. 31, 1949.

A key source to journal and conference abbreviations in the sciences. Although it focuses on chemistry, other scientific and engineering disciplines are also well represented. In addition to the abbreviation and full title, each entry also contains publishing info, title changes, language and frequency of publication, and libraries owning that title. Over 130,000 entries representing more than 70,000 publications dating back to 1907 are included.