Letter from Gus A. Amundsen to Isaac H. Kempner confirming Mr. Kempner's purchase of tickets for the upcoming Mardi Gras celebration event.

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

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

Letter from Battelstein's to Mr. and Mrs. I. H. Kempner discussing the letter that Kempner sent to Mrs. Seybold and planning to get together and catch up when the Battelstein's are in Galveston next.

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

Prior to April 1948 the generally accepted method of reducing the radioactive contamination of metal tools and laboratory apparatus was a series of rinses in aqua regia or various other concentrated acids. This method proved unsatisfactory for three reasons. (A) It was not a dependable method of removing activity. (B) It had a delecterious effect on tools in that it caused serious pitting, which resulted in weakened parts, and exposed a bare metal that was subject to very rapid corrosion. (C) Tools and apparatus once cleaned by this method could not readily be cleaned a second time. With the aforementioned limitations in mind, it became obvious that a new method was required. After considerable investigation into a electrochemical processes the present method was developed. Essentially, the new method is an electropolish bath to remove the activity lodged in the pores of the metal, and a ``follow-up`` chrome plate bath to render the surface impassive to corrosion.

The supersonic method of cleaning glassware is an outgrowth of the fact that it has been heretofore impossible to manually clean ground glass and quartz joints because the activity became lodged in the small pores of the ground surfaces. It has been theorized that the nature of the forces binding polonium to the glass is similar to that of the chemical bond but are less intense. The problem then becomes one of finding a force greater than this binding energy, capable of freeing the activity from the glass. This has been accomplished by using frequencies of 100 cycles to 20 kc at a power output from 2 to 20 watts, passing through a citric acid solution (pH-2) into which the contaminated article is placed. The optimum results, using a tank with the dimensions 7 in. {times} 7 in. {times} 7 in. and 3 liters of solution, has been found at 200 cycles or harmonics of 200 cycles. Citric acid was used because of the fact that it forms a soluble complex with polonium. The frequencies used have been kept within the sonic range until enough data has been obtained and correlated to warrant the design and construction of more costly …

Floor plan for a proposed elementary school building in Iraan, Texas. It includes the floor plan with various rooms.

Floor plan for a proposed elementary school building in Iraan, Texas. It includes the floor plan with various rooms.

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

Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.

Two men standing beside delivery truck. Sign on door of truck reads: "Radio and Telephone Equipped." One of the men is talking on the telephone.

Two men standing beside two delivery trucks in front of building. The Prescription Laboratory was a retail pharmacy with two locations. Number 1 was located at 125 1/2 W. 7th Street. Number 2 was located at 1501 Guadalupe Street. Owners were Gary E. Bray and Howell R. Jordan.

Photograph of the interior of The Prescription Laboratory. Prescription Laboratory #1 was located at 125 1/2 W. 7th St. and #2 was located at 1501 Guadalupe. G.E. Bray and Jordan Howell were the pharmacists.

Interior photo of The Prescription Laboratory showing seating area and display cases. Located at 125 1/2 W. 7th.

Photograph of the interior of The Prescription Laboratory. Located at 125 1/2 W. 7th.

Exterior photograph of The Prescription Laboratory. Photo was taken at night. Located at 125 1/2 W. 7th.

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

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

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

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

Daily newspaper (except Sunday) from Breckenridge, Texas that includes local, state and national news along with extensive advertising.

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

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