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Some proposals appearing in the literature of laser-initiated thermonuclear fusion microexplosions which assertedly produce about as much thermonuclear energy as was inputted in laser light have been evaluated on physics simulation computer codes. These codes simulate in considerable detail the physical processes deemed to be relevant in such proposed schemes to produce a time history of the proposed microexplosion system. Output of such codes will be presented to demonstrate that the thermonuclear performance of such systems fall far short of approximation-rich analytic estimates, and the role of such approximations in producing such discrepancies is briefly discussed.

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With the advent of a new generation of high-energy and high-intensity proton accelerators such as the one being built at the National Accelerator Laboratory and the one proposed by CERN, the problem of shielding external proton targets, the secondary beams produced from these targets, and even the secondary targets in the experimental areas becomes quite a massive and expensive project. In addition to the massive hadron shielding required, the high-energy muons produced by the decay of pions and kaons add large amounts of shielding especially in the forward (beam) direction. Homogeneous shields can be designed with programs which have been discussed previously. They have developed a computer program which allows them to design heterogeneous shields with voids and/or magnetic fields. The heterogeneous shields without magnetic fields are called passive shields and those with magnetic fields are called active shields. Results of some of the studies made on the design of such shields are presented. Specific application to the design of shielding for a primary external proton beam target and for a specific experiment are discussed.

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Proceedings of the First Northwest Conference on Geothermal Power, including a compilation of nine of the ten papers presented at the conference and a list of attendees.

Article regarding news from Langston University and announcing the inclusion of Zella Patterson in the list of personalities of the South.

In accord with recent custom, the organizing committee for this conference has scheduled this review paper on beam instabilities. In view of the various review papers which already exist and the fact that the fundamentals of the subject have even been treated in a textbook, I thought this paper might best be devoted to a limited part of the rather large field of beam instabilities. Thus, I have selected only an aspect of the general subject, but an aspect which has during the last years been very much at the center of activity, and will--if my judgment is correct--be even more so in the years to come. I wish to concentrate, here, on the interaction of a relativistic particle beam with itself which is a result of the coupling of the beam with its surroundings. Before approaching this topic, a few remarks on the existing review papers are in order. A comprehensive treatment of beam instabilities may be found in Ref. 1, where, also, the reader will find some 48 references to the original literature. In Refs. 2 and 3, the General subject is approached from other points of view. Reference 4 is concerned with some special topics, but treats …

Article attempts to corroborate the account of Pedro Jaungonzales who claims to have stayed at a fort used for digging, smelting, and protecting the Mexico-Texas border during Texas' fight for independence called Cascorillo. Few archeological artifacts have been found to confirm his story.

Article narrates how the Chickasaws lived, prospered, and operated in their native lands before being relocated to the Oklahoma Territory. The article also mentions how the tribe adapted to their changing circumstances before the Civil War.

Article commemorates the fiftieth anniversary issue of The Chronicles of Oklahoma with a letter from the editor.

Article chronicles the success of the first Indian International Fair. Included within the article is an introduction to the fair followed by notes by Will R. Robinson who attended the fair during his childhood. Also included is a list of items offered throughout the fair's exhibits with rules and regulations.

This section includes the minutes of the quarterly meeting of the Board of Directors of the Oklahoma Historical Society held on January 28, 1971. This section also includes the minutes of the meeting of the Executive Committee of the Oklahoma Historical Society held on February 18, 1971. Included is a list of gifts received by the organization and a list of new annual members.

Notes and Documents column including a thankful tribute to all the contributors to the magazine throughout its fifty years with special attention to Gary Hugh McKinney and a list of books accessioned and catalogued by the organization's library.

Article chronicles the history of the Old Bar X Ranch, a ranch that stood as a landmark at the end of a trail cattlemen used for grazing their herds.

Article recounts Sister Mary Agnes Newchurch's time at a mission schools in Tulsa and Vinita during a year of financial difficulties and misunderstandings with the communities. She was the last surviving member who taught at these communities at the time of her testimony.

Article narrates the legal and political battles fought over settlement of the Cherokee Outlet that accumulated into the creation of Rock Falls, a townsite that forced a confrontation between cattlemen and government agencies.

Article narrates Oklahoma's history through looking at how settlers encroached on Indian Territory.

The synthesis of nonracemic yields of hexa-, hepta-, octa-, and nonhelicene with circular light was observed, and the structural and wavelength dependence of the induced optical yields was examined. The results obtained, together with a detailed consideration of the mechanism of helicene synthesis from the parent diarylolefins, indicate that the induced optical activity is due to selective reaction of enantiomeric conformations of the parent cis diarylolefins by circular light.

Fatty acids have a reversible inhibitory effect on respiration and on photosynthetic action. They investigated the influence of octanoic acid on the photosynthetic bacteria Rhodopseudomonas spheroids R-26. From the spectroscopic data they conclude that a less efficient energy transfer and decoupling of the light harvesting pigment system from the energy converting reaction center is responsible for the inhibitory effect.

We report properties of single-wire proportional chambers and multiple-wire ionization chambers filled with liquid xenon. Proportional multiplication is seen for anode fields > 10{sup 6} volts/cm (anode-cathode voltage> 1 kV for a 3.5-{micro}-diam anode wire). The efficiency for detecting ionizing radiation is {approx} 100%. The time resolution of the chambers is {+-} 10{sup -7} sec. We attained a spatial resolution of {+-} 15 {micro} with a multiwire ionization chamber, considerably better than that of any other real-time particle detector.