The objectives were to develop methods for measuring the mobility of ions in water by means of ion injection techniques with the ultimate goal of using these data to investigate the feasibility of using the Hall effect to measure impurity ion mobilities at dilute ionic concentrations. A number of preliminary studies proved to be necessary in order to accomplish the primary goals. These experiments which have been completed include ion mobility studies in water vapor, studies of corona discharges from fine points in water vapor, injection of ions into water using corona methods, and ejection of ions from water into water vapor. These measurements were performed for both positive and negative ions. Results indicate that injection techniques using coronas are not suitable for ion mobility measurements in water. (Author)