The influence on solvent sublation of changes in flow rate, temperature, and collector and colligend concentrations is determined. Recoveries increase with flow rate but not proportionately, increase with collector and colligend concentrations above the stoichiometric values, and decrease with rising temperatures. Sublations were followed by analyses of both aqueous and organic layers using radiotracer and spectrophotometric methods, respectively. The effects lire explained by a currently accepted mechanism of the process and on the basis of excess surface area being available. The latter is shown to be true by photography and measurement of bubbles.