Publications by other investigators on the production of cavitation in liquids and its effects are discussed. Several points in favor of low frequency cavitation studies are listed. Two methods were used by the author to feed power at about 30 cycles/sec into the liquids. In one method a thick‐walled Lucite tube containing the liquid was attached to the vibrating element of a Sonntag Universal Fatigue Machine. Similar results were obtained with a modified paint spraying compressor which had a vibrating diaphragm instead of a metal piston. Photographs show both methods. Emulsions and suspensions were made in a few minutes, the cleansing effect on cloth soiled in a standard manner was tested and the oxide coating on aluminum foil was removed. Probably greater corrosive effects could be obtained with the same power at higher frequencies.