The Metallurgical Laboratory Technical Research Notebooks consist of hardcover notebooks assigned to individual scientists to record daily activities, experimental results, and ongoing research. Information includes the employee's name, dates of use, references to previous notebooks, experimental notes, parameters, observations, tables of results, analysis of data, dates work was conducted, names and amounts of chemicals used or produced, procedures used, calculations, graphs, flowcharts, illustrations, mechanical information about equipment used, and calibration information.
Early notebooks contain a great deal of information about uranium and plutonium.
Box 3306 contains a notebook discussing work with lanthanum salts. Work locations are rarely identified.