The prospect of allowing the patient to treat himself was approached with hesitation, since carelessness, poor mentality, and lack of cooperation might spoil the whole plan. These fears have been groundless, because the more active participation under supervision has increased the patient's interest and cooperation. The danger of placing electrical therapeutic apparatus in the hands of the patient has been appreciated, and the unit has been constructed so that the patient cannot possibly do any real harm. The experiment has shown that proper electrical stimulation of muscles can be simply applied and continued for long periods by the average patient.