The Fred Loomis Mohler collection contains articles written by Mohler and his colleagues that reflect their scientific research. The Writings-Mohler series consists of articles written by Fred Loomis Mohler. These documents focus on his discoveries, specifically in atomic physics, mass spectra of specific elements such as nitrogen, photoionization, recombination of ions, and cesium vapor. The Writings-Associates series contains scientific journal articles published by Mohler's colleagues and mentors. Many of these articles pertain to studies Mohler himself was performing, such as Boeckner's experimentation with cesium.