Photograph taken for a story in the Oklahoma Times newspaper.

Among the spallation products obtained from the 350-Mev proton bombardment of Th{sup 232} they have identified two gaseous alpha-emitters which apparently do not decay into any presently known alpha-decay chains. The half-lives observed for the decay of the alpha-activities are 23 minutes and 2.1 hours. These half-lives may be principally determined by an unknown amount of orbital electron capture. At least one alpha-emitting daughter (about 4 hours half-life) has been observed to grow from a gaseous parent, but it has not been determined whether it arises from alpha-decay or electron-capture. Since these gaseous atoms emit alpha-particles it is assumed that they are isotopes of element 86 (emanation or radon) rather than a lighter rare gas. if they were heavy isotopes such as Em{sup 221} or Em{sup 223}, both unknown, they would decay into known alpha-decay series, the neptunium and actinium series, respectively, and so would grow known short lived alpha-emitters which would have been detected. It thus appears reasonable that they must be lighter than the known emanation isotopes.

Some time ago we started work in an attempt to observe alpha-particle decay in isotopes of atomic number less than 83. In the first experiments, thin targets of gold leaf were bombarded with 190-Mev deuterons in the 184-inch cyclotron. Two alpha-decay periods were observed in these targets; one of 0.7 minutes half-life and another of 4.3 minutes half-life. The alpha-particle energies were 5.7 and 5.2 Mev, respectively. Chemical separations proved that the 4.3-minute period is due to a gold isotope and suggested that the 0.7-minute period is due to a mercury isotope. The mass numbers of these new isotopes have not been determined. However, the results of excitation-functions in the production of the gold isotope by bombarding gold and platinum with protons suggest that its mass number lies in the range 185-188. The work on this isotope indicates that the alpha to electron capture branching ratio is of the order of magnitude of 10{sup -4}, and that positron activity accompanies the 4.3-minute alpha-period.

The Delaware, Lackawanna and Western Railroad's predecessor to the Phoebe Snow, the Lackawanna Limited, second section of train No. 6 arriving at Slateford Junction, Pennsylvania, on the Delaware Water Gap, in September 1949. The train is headed by a Pacific type locomotive.

Daily newspaper from Brenham, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.

Photograph of a train engine and attached cars on railroad tracks, viewed from the side. "651" and "Texas & Pacific" are visible on the side. Additional tracks lay in front, grass between them. Trees and poles rises above the train in the background. Handwritten text below the image says, "Marshall, Texas Sept 5 1949."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "As a souvenir of the project, Jo Martain, left, manager of the Downtown Chevrolet Queens, presents the ball used in the first telecast to P.A. Sugg, manger of the television station."

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

Photograph used for a story in the Oklahoma Times newspaper.

Photograph used for a newspaper owned by the Oklahoma Publishing Company.

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mrs. Walter R. Shuttee, Nee, Elaine Hayes, city, Drama Student at Univ. of New Mexico, Actress"

Photograph of Sam Myres wearing a black cowboy hat, a button up jacket, and a white button up shirt tucked in. He is also wearing dark pants and cowboy boots. To his right, there is a man wearing a white button up shirt with a tan cowboy hat. To his right, there is a young girl with short curly hair wearing a button up top, she is holding a white cowboy hat. Next to her is a young boy who is wearing a cowboy hat and striped button up shirt. There is a horse to the far right slightly in the back. In the very back of the photograph is a wooden fence. They are standing outside in what seems to be a corral.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Monthly statement documenting the amount invoiced by Joe Grasso & Son for shrimp and other seafood for the month of August. This order consisted of Frozen Shrimps.

Weekly newspaper from Mineola, Texas that includes local, state, and national news along with advertising.

Semiweekly newspaper from Kermit, Texas that includes local, state, and national news along with advertising.

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Gov. Roy J. Turner cut the gold and blue ribbons across the door of the new $725,000 women's dormitory-student union building at Southwestern State college, Durant, Monday afternoon as the structure was dedicated before a crowd of several thousands."

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Mount Pleasant, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Chickasha, Oklahoma that includes local, state and national news along with advertising.

Daily newspaper from Abilene, Texas that includes local, state, and national news along with advertising.

Letter from Daniel W. Kempner to Thomas L. James requesting for an order change regarding the 6 volt A batteries.