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This machine may be attached to the ordinary ribstool (Fig. 6) , or may have a quadrangular frame of gaspipe to support it (Fig. 7) . The weights are lifted by a lever, and the amount of weight varies according to the tolerance or resistance met in the individual cases. Patients can remain in this machine for a more pro¬ longed period than in the majority of corrective appli¬ ances, and for the past eight months I have found it a most helpful aid in the treatment of this class of cases. Itdoi:10.1001/jama.1904.92490590011001c fatcat:wyqpgzf74bdifir6y2z576ahze