Further ultrasonic-absorption measurements have been made at 104–108 cps in a number of electrolytes including iodides, chlorides, acetates, acetic acid, and mixtures of electrolytes. A number of these electrolytes exhibit interesting relaxation effects, which have been interpreted quantitatively in terms of specific ion-ion and ion-solvent interactions. Reexamination of several systems for which ultrasonic relaxation effects have been reported by other workers, however, has failed to confirm these relaxation effects. These surprising findings reflect the need for greater acuracy in absorption measurements, particularly at frequencies below 5 Mc/sec, and the need for caution among acousticians to prevent overinterpretation of their data under conditions where statistical fluctuations as well as consistent errors are substantial. In addition, several instances are cited where relaxation effects reported in the literature have been confirmed but the explanations are not compatible with accepted concepts of electrolytes. New explanations are presented. [This research has been supported by the U. S. Office of Naval Research.]