When the acting part or head is lowered to its extreme limit, the machine occupies the least space. In this position, by means of the foot-holder it communicates oscillation to the legs; by means of the single-rubber, it acts upon the feet, ankles, and lower leg; by means of the double-rubber, it acts upon the legs, including the feet, the patient either sitting or lying.
In all of these applications of motion, energy travels from inanimate to animate matter; non-vital contributes to vital energy: and the various processes through which vital power is developed are promoted and carried forward in a degree till the point which constitutes health is attained.
The name, Manipulator, is very naturally applied to the instrument, the action of which resembles so much that of the living operator. It is, however, impossible for the unaided hand to impart the degree of rapidity necessary to secure the effects easily attained by this machine; and, practically, restoration is often secured in cases in which it is quite unattainable by any other remedial agent.
Motion, transmitted by the manipulator, exerts a curative effect in all chronic affections, and is not limited, as is sometimes supposed, to paralytic affections and deformities. In these latter affections it is a great assistance in effecting a cure; while, in chronic affections, whatever the local symptoms, it supplies the additional energy which is indispensable for recovery in all diseases of long standing.
Mode of Operation.—Fig. 4 represents the manipulator in operation. The machine is propelled by steam power at the Invalids' Hotel and Surgical Institute, but may be worked by hand, as here represented. One arm is inserted between the double-rubbing pads, which are raised to about the height of the shoulders, the patient being seated at the side of the machine; the other hand is placed on the lever, and as much pressure is applied as is perfectly agreeable, care being taken to diminish the pressure at any part which is unusually sensitive. All portions of the arm from the shoulder down are successively included in the rubbers, while a suitable degree of reciprocating or rubbing action is obtained by giving motion to the wheel.
To apply the same operation to the other arm, the patient may either turn in his seat or change his position to the opposite side of the machine.
If any portion of the extremity is affected with inflammation or swelling, it is necessary to apply the action described to the whole of the unaffected portion first; after this the affected part may be beneficially operated on, provided that the sensations are strictly heeded, and that it is so managed that only a comfortable feeling is produced.