The salts precipitated from lithium solutions by uranyl acetate sodium reagents are always triple acetates analogous in composition to the triple acetates precipitated from sodium solutions by these reagents. Though the water content of most of the isolated lithium triple salts is slightly variable, depending upon the conditions of drying, approximately six molecules of water of hydration are present in the salts dried to constant weight at 100-105° C. No precipitates were formed in concentrated lithium solutions by the experimental cadmium, mercury, and copper uranyl acetate reagents, and it is doubtful therefore whether the corresponding lithium triple salts exist. It seems certain that such lithium salts cannot be prepared by the method used in this investigation. The same salt KUO₂ (C₂H₃O₂)₃ is precipitated from concentrated potassium solution by all types of uranyl acetate reagents for sodium. The copper uranyl acetate reagent prepared for use in these experiments appears to be a more nearly specific qualitative reagent for sodium than any other type of uranyl acetate sodium reagent, since it is a moderately sensitive reagent, since it is a moderately sensitive reagent for sodium and yet forms no precipitate with lithium solutions.