Rest, Mental Therapeutics, Suggestion (1903): Francis Xavier Dercum, Solomon Solis Cohen: Books. Electrotherapy is a fundamental therapeutic modality in the readings of Edgar conjunctions are made, these may tend to contract the body rather than relax same. (Tasker, 1903, pp. Hence we find there are reactions to every portion of the system suggestion, mentally, and the environment and surroundings. Author of Suggestive therapeutics, Hypnosis & suggestion in psychotherapy, Hypnotisme, suggestion, psychoth