Illustration showing various instruments used in vibratory massage. Round or square Concussor Plates, Concussor Rollers, Balls and Discs, Roller with rotating cylinders and ebonite, Rotating hammers and Centrifugal Vibrator

Licence: In copyright

Credit: Illustration showing various instruments used in vibratory massage. Round or square Concussor Plates, Concussor Rollers, Balls and Discs, Roller with rotating cylinders and ebonite, Rotating hammers and Centrifugal Vibrator. Wellcome Collection. Source: Wellcome Collection.