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Present knowledge of United States tar sands, including physical properties, occurrence, reserves, and recovery methods, is reviewed and evaluated. Tar sands are oil-, bitumen-, asphalt-, tar-, or petroleum-impregnated rock from which little hydrocarbon material is recoverable by conventional crude oil production techniques. Tar sand oil has been produced by steam injection and underground combustion techniques and by mining methods. However, efficient application of nonmining recovery techniques is hindered because of difficulties in establishing and maintaining formation permeability. Mining and processing methods being used in or proposed for Canadian commercial operations are also discussed.

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Two beam choppers were constructed which produce an approximately square, 20-ns pulse of 3+-MeV electrons out of the best portion of the 300-ns Astron beam or an 8-{micro}s microwave electron linac beam for injection into the electron-ring accelerator (ERA) compressor. The choppers are impedance-matched traveling-wave devices which deflect the beam with equal strength electric and magnetic forces, and are powered with either three-electrode spark gaps or thyratrons and a 20-ns pulse line. The electron beam is biased out of the beam-transport system with a dc magnetic field, and switched into it with the chopper.

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No abstract currently available for this document at the current time.

A review of methods for static-field compression of an electron ring is shown to suggest advantages for a method in which there is no axial acceleration or deceleration of the ring. In the method proposed here the static magnetic field itself is o such a character that the electrons are neither focused nor defocused in the axial direction. The integrity and movement of the ring through the compressor is controlled by a small traveling magnetic well. The feasibility of creating such a traveling well is discussed, and an example is presented of a current distribution capable of producing the static magnetic field of the compressor.

Article on membrane filter-fluorescent-antibody method for detection and enumeration of bacteria in water.

Article highlights the accomplishments of Oklahoma State University's fifth president, Angelo Cyrus Scott.

Article outlines the events surrounding the centennial anniversary of the Battle of Honey Springs, the largest battle fought during the Civil War within present-day Oklahoma. The battle was the catalyst for Federal troops to gain control of the territory through the capture of Fort Smith. A commemorative park was created for the battlefield.

This section includes the minutes of the quarterly meeting of the Board of Directors of the Oklahoma Historical Society that was held on January 23, 1969.

Article outlines the history and accomplishments of various Black infantry regiments throughout the Civil War. This was the first time in United States history that Black men were allowed to fight as soldiers for the country.

Notes and Documents column including a note announcing the distribution of the Annual Index of The Chronicles, a narrative of Thomas Young hunting wild game within the Indian Territories, and a list of books catalogued by the Oklahoma Historical Society.

Article outlines the struggles American Indians faced during the expansion of two railroads into their territories. The tribal governments fought in courts to cease the expansion of the Atlantic and Pacific railroads, but were hindered in their efforts by lobbying from the companies and racist ideologies.

The effects of several perturbations are investigated. They are: modification of the shape of a pole, error excitation, displacement, and rotation of a pole. The effects are described in terms of changes of multipole coefficients. General relationships between some of these coefficients are described, and formulae are derived that allow their calculation for a model 2N-pole magnet. Numerical values of these coefficients are given for a quadrupole, sextupole, and octupole.

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Management of radioactive wastes at the Hanford site is presented. Radionuclide migration is also addressed.

Article chronicles the trials faced by Colonel Albert Sidney Johnston's marching party as they made their way towards West Texas. The party was to provide aid to settlers dealing with raiding Comanche Indians. The article contains portions of Colonel Johnston's wife, Eliza's, journal entries.