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Nearly a year ago it occurred to me that if it were possible to give a treatment in which the effect of either dry or moist heat of any desired intensity could be added to that of mechanical vibration the value of the latter might be greatly modified, and perhaps markedly increased. Most of the available time since has been devoted to perfecting apparatus for attaining this end, and not only has this been successfully done, but enough clinical and other data have been accumulated to warrant a preliminary statement.
In brief, what has been done has been to insert a resistance coil into the same space ordinarily occupied by a ball vibratode. The case surrounding the coil is of metal, and screws on the vibrator shaft just as an ordinary vibratode screws on. From a plug switch on the bale of the vibrator a short cable passes
HITCHINGS FW. THERMOVIBRASSAGE: A NEW METHOD OF TREATMENT.PRELIMINARY REPORT.. JAMA. 1906;XLVII(17):1376-1377. doi:10.1001/jama.1906.25210170040003