In an early continuation of the investigation of the radioactive isotopes of element number 43 (technetium) Segre and Seaborg produced by the deuteron and neutron bombardment of molybdenum the isotope Tc{sup 99}, which they observed to decay by means of an isomeric transition with a half-life of 6.6 hours to a lower isomeric state with a half-life greater than 40 years. The upper isomeric state of this isotope was observed by Segre and C. S. Wu to be produced in the fission of uranium and more recently R. P. Schumann and also D. C. Lincoln and W. H Sullivan working on the Plutonium Project of the Manhattan District have independently observed the beta-particles of half-life about 10 years due to the lower isomeric state. Later work by E. E. Motta and G. E. Boyd sets a more accurate value of 9.4 x 10{sup 5} years for this half-life. Since this isotope is formed in rather large amounts, namely, a fission yield of 6.2%, in the slow neutron induced fission of uranium it is now possible to isolate technetium in weighable amounts and in rather substantial quantities. For example, a uranium pile operating at a power level of 10{sup 5} kw …

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Article recounts President Herbert Hoover's experiences living among the Osage tribe within Indian Territory before his election into the presidency.

Article chronicles the career of Horace Speed, a prominent attorney within the Indian Territory.

Article recounts the expedition undertaken by General Henry Leavenworth and Travis G. Wright to negotiate peace between the Comanche, Kiowa, and Wichita tribes and the United States government.

Article chronicles how mission school were set up within the Indian Territory for the Quapaw tribesmen.

Article honors the men from Oklahoma who have died fighting in World War II after the last publication of a similar list. The country would continue to be a major player in the war until 1945.

Article chronicles the lives of members of the Moore family who traded furs and pelts with tribes living within Indian Territory. These members include: Lyman Moore Sr., Edgar Allen Moore, Lyman Moore Jr., and Herbert McClain Moore.

Notes and Documents section for Volume 25, Number 1, Spring 1947. It includes a note on the publication of an index, a note on the receipt of the silver service set from the U.S.S. Oklahoma from the Navy Department, a list of members of the Oklahoma Historical Society, and the minutes for the quarterly meeting of the Board of Directors of the Oklahoma Historical Society held on January 23, 1947.