Technical report that attempts to bring together the various chemical procedures which proved most useful in studying the results of cyclotron bombardment or small scale neutron bombardments of heavy element targets. The report is limited to the elements of the "actinide", or second rare earth series, starting with thorium and including the newly discovered elements of atomic number 95 and 96. Every attempt is made to include all details necessary so this report can serve as a practical laboratory guide. The report covers separation problems, time factors, and dealing with dangerously radioactive targets.

Abstract: "This report includes details of the procedure along with the die and equipment descriptions for preparing tungsten copper alloy pieces."

Abstract: "This report indicates some of the methods employed at Los Alamos for the fabrication of refractory products."

The following report discusses findings resulting from experiments on recycled carbon tetrachloride at various stages of the proposed purification process.

This report describes an instrument used for electrolytic separation. It was one of four instruments previous used and improved, yet lacked details until now. The instrument's design and operation is described herein.

From abstract: "The distribution of carrier-free thorium, protoactinium and neptunium in the rat following intramuscular and oral administration has been studied. Oral adsorption for all three is negligible. Following parenteral administration, the skeleton is the organ showing the highest degree of prolonged and selective localization."