WEIZMANN Institute of Science, Rehovoth, Israel, will play host to an International Conference on Nuclear Structure to be held September 9-16 under the sponsorship of Unesco and IUPAP. Nine sessions are planned with two or three invited papers at each session. There will be no contributed papers. However, participants have been invited to present remarks during the 45-minute discussion period following each session. Those expecting to take part in the discussion must register for the Conference before July 31st and must submit a brief resume of their comments.

THIS is the fourth volume published in the series on Methods of Experimental Physics (see Physics Today, May 1960). It is the first of two parts devoted to "the principal methods and their relative merits for the measurement of a specific quantity in nuclear physics" where the term nuclear physics "comprises both the high- and low-energy regions". This is the aim stated in the preface by the distinguished editors. To prepare such a survey the editors have obtained the help of many well-known experts. The present volume covers principles and methods of particle detection, and the determination of charge, size, momentum, and energy. The particles and radiations studied in the low-energy region are discussed far more than those studied in high-energy physics.

AT the Westinghousi- Research Laboratories we have recently re-examined four questions which scientists have asked many times: (1) What does a corporation expect of a central research and development activity?; (2) Why carry out basic research in industry?; (3) Are scientific objectives and the profit motive compatible?; (4) What support should management provide the research scientist? The answers to these questions are important to us because they are important to our scientists. We have sought, therefore, to ask ourselves these and similar questions as directly as the scientists themselves would put them and then to seek answers in language just as understandable.

THE giant but youthful research laboratories in England and Europe are much less well known to Americans than the great foreign universities. This situation is changing as an increasing number of American physicists are making extended visits to laboratories such as Harwell, in England. The movement is made possible by the world-wide relaxation of security restrictions in the "basic" sciences, reactor engineering, and thermonuclear research as well as by the removal of classified work to separate sites. Today Harwell, for one, directly employs non-Commonwealth scientists including Americans while other visitors are "attached", meaning on leave from their regular posts and not paid by Harwell. And I should say at once that the enthusiasm of Egon Bretscher, head of Nuclear Physics, has sparked many visits to Harwell by American physicists.

My instructions this morning were to give a survey of the subject we call elementary particle physics, emphasizing the experimental aspects. I will choose what I believe to be interesting and exciting and try to see how we got where we are. The objects we call elementary particles have changed over the years and Fig. 1 is meant to illustrate this.

As you know, the macrobaryon falls just as fast as the macrolepton. The systematic search for the simple objects and their interactions may well have begun with Galileo in Pisa—the first, incidentally, almost vertical linear accelerator.

AS specialization increases within the various branches - of high- and low-energy nuclear physics, it becomes rather easy for an experimenter in one of the branches to lose touch with the details of advances in the methods and techniques of the others. Yet, many facets of apparently different techniques may well be valuable to experimenters in areas other than those for which they were originally developed.

This text, which presents detailed descriptions of many of the methods and techniques of experimental nuclear physics, is especially valuable in providing a point of contact not only for such experimenters but also for beginning research students. The discussions and intercomparisons between methods are often at the detailed level one would associate with hallway discussions and personal contacts at Physical Society meetings. In addition, the very complete lists of references make the retrieval of background information from other published sources especially easy.

MEETINGS to discuss the theory and applications of the Mossbauer effect can be summarized by the application of a mathematical series. This was pointed out by Dr. Hans Frauenfelder (University of Illinois) in an afterdinner talk at the Third International Conference on the Mossbauer Effect, sponsored by the Advanced Research Projects Agency and held at Cornell University in Ithaca, N. Y. The oddnumbered meetings take place in isolated places, have long sessions, and are free of temptations. The even-numbered meetings take place in exotic places, have short sessions, and provide the conferees with all manner of extracurricular activity. Experimental evidence in support of this theory can be found in Table 1.

Columbia University's original cyclotron, a 10-MeV machine that has stood in the basement of Pupin Hall for 27 years, is being dismantled and sent to the Smithsonian Institution where it will be set up as an historical exhibit. The machine was one of the first particle accelerators constructed in the United States and was used for early experiments on the fission of uranium nuclei as well as other important work.

Marvin Fox, a nuclear physicist who specialized in the design and construction of nuclear reactors, died on March 19 of a heart attack. Dr. Fox, who was 55 years old, had been manager of arms control for the Hughes Aircraft Company.

For the past four years (1965-68) the New England Nuclear Corp (a supplier of Mossbauer sources) has sponsored a Mossbauer-Effect Methodology Symposium held prior to the annual meeting of the American Physical Society. The present volume, edited by Irwin Gruverman of New England Nuclear, contains proceedings of the third symposium held in New York, in January, 1967. The volume is composed of two sections, the larger being a collection of applications of Mossbauer spectroscopy in the area of material sciences; the second section is devoted to the methodology of several relatively recently developed Mossbauer nuclides. The level of the articles is generally introductory and for the most part the discussions are accessible to nonspecialists.