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Transplants of sarcoma 37 were studied in regard to spontaneous regression of the tumor after irradiation and after the administration of immune serum. The following results were obtained: 1. Of 809 animals, 99% developed the tumor after transplantation; 2. The number of cells transplanted did not influence the growth rate, the percentage of spontaneous regressions, or the life spans of the animals; 3. Reimplantation of the tumor into mice which had previously rejected the tumor resulted in very few successful transplants; 4. The resistance of these mice to further attempts at implantation could not be altered by previous irradiation; 5. Animals transplanted for the first time suffer a faster evolution of the tumor, shortened life span, and a diminution of spontaneous regressions if they have been irradiated prior to transplantation (400r whole body); and, 6. Resistance to tumor growth could not be transferred passively in serum of mice which had rejected the tumor.

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The vapors of potassium, rubidium, and cesium have been photoionized with light absorbed in the discrete region of the atomic spectrum. The energy threshold for the ionization process has been determined and the ions produced identified by mobility measurements. The data give lower limits for the dissociation energies of K{sup +2}, Rb{sup +2} and Cs{sup +2}. Each of these molecular ions has a bond energy approximately 50% greater than that of the corresponding neutral molecule. In addition, lower limits for the electron affinities of the alkali atoms and approximate values for the mobilities of Rb{sup +} and Rb{sup +2} in rubidium vapor are given.

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This section includes the minutes of the quarterly meeting of the Board of Directors of the Oklahoma Historical Society that was held on January 28, 1965.

Article presents the account of the Revered John Edwards, a missionary to the Choctaws at the Wheelock Mission in Oklahoma, about his leaving the South at the beginning of the Civil War. Edwards explains various personal views, including his distaste for slavery, his faith, and reasons for leaving.

Article discusses the history of the Neosho Agency, which served American Indian tribes in the northeast corner of Oklahoma from 1838 to 1871. Frank H. Harris discusses the agents that ran the agency and includes excerpts of the records they kept.

Notes and Documents column including documents about the index to the Chronicles, the real name of Cherokee leader Tsali and the story of Will West Long, and the unveiling of the bronze sculpture of Alice Brown Davis, Chieftain of the Seminoles.

Article explores the history of the Muscogee, or Creek Nation, focusing on the actions of its chiefs and leaders and relations with the U.S. government. Bert Hodges traces the core presence of the McIntosh family in this history of leaders.

Article examines human communities in prehistoric Oklahoma through investigation of evidence found in archaeological sites. A. M. Gibson discusses how these findings illustrate the way of life early hunters followed, and the growth and development of this way of life.

Article provides a biographical tribute to the life and career of Richard Henry Cloyd. John E. Luttrell discusses his early education, teaching experience, time as Mayor of Norman, Oklahoma, service in the United States army, membership on the OHS Board of Directors, and appointment as Judge of the City Court.

Article discusses the debate over the adoption of the prohibition clause in the Oklahoma constitution, the experiment carried out and subsequent enforcement, and the discontinuation of dispensaries that followed.

EARLIER investigations have demonstrated that di-cyandiamide (DCDA), the dimer of cyanamide, can successfully promote the dehydration condensation of: (1) glucose and orthophosphate to give glucose-6-phosphate; (2) adenosine and orthophosphate to give adenosine-5'-monophosphate; (3) orthophosphate to give pyrophosphate; (4) alanine to give alanylalanine and alanylalanylalanine. These reactions were carried out in dilute aqueous solutions in the dark. (It was also demonstrated that the combination of ultra-violet light and dicyandiamide could promote the synthesis of dipeptides. This observation has since been confirmed by other investigators.) These experiments were designed to demonstrate one possible means by which such compounds could have been formed on the prebiotic Earth, thus providing materials needed for the origin of living systems. Dicyandiamide itself could have been, present on the primitive Earth as was demonstrated with the ultra-violet irradiation of cyanide solution.

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