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To the Editor:
—In a recent communication (The Journal, Dec. 15, 1928, p. 1913) Dr. R. B. Rogers compared his method of applying vibratory massage to the prostate with the method described by me in The Journal (Nov. 3, 1928, p. 1371).First, Dr. Rogers employs "an ordinary drug store vibrator" of a mechanical (not pneumatic) type, which provides a circular motion of the applicator on the second metacarpal. It is obvious that much of this vibration is lost before it reaches the finger tip in contact with the prostate. In the apparatus that I described, a high speed air compressor (oscillator) is used, which sends 8,000 "up and down" air vibrations a minute directly to the tip of the index finger in the rectum. There is no loss of vibrations as with the ordinary motor vibrator.Second, Dr. Rogers increases or decreases the pressure of the finger on the
Wolbarst AL. VIBRATORY MASSAGE OF PROSTATE. JAMA. 1929;92(10):829. doi:10.1001/jama.1929.02700360067030