III. Electrical records can be secured characteristic respectively of looking to the right, left, up and down. These can generally be distinguished from frowning, winking, and convergence. During visual imagination and recollection electrical records are secured from the ocular muscles, producing photographic patterns like those following instructions to look in directions specified. As shown by these records, eye-movements characteristically occur during visual imagination and recollection. When the trained subject is requested to relax his eye-muscles, the curve becomes relatively horizontal and straight, characteristic of relaxation, and the visual imagination or recollection disappears, according to his report. Likewise, during control periods, when the subject has been instructed to keep his eye-muscles relaxed, he reports the absence of visual imagination or recollection. Reaction and relaxation times, except for minor differences, tally for tests following the instruction to imagine or recollect as compared with the instruction to look in a particular direction.[long dash]IV. Contraction of specific muscles takes place following the instruction to imagine an act performed with the voluntary musculature. The movement usually is of microscopic extent and generally confined within the group of muscles whose contraction would be required for the actual performance of the voluntary act. Imagination of a particular act performed by some portion of the body fails to occur if at the same time the muscles of this portion are completely relaxed. This supports the view that the contraction of specific muscles is essential to the occurrence of at least certain mental activities. The conclusion drawn by previous investigators that action-potentials from muscles always are associated with actual contraction is here extended to include a range of extremely low voltages. Evidence is conclusive that the electrical records (V2m[degree]) during imagination, recollection and other mental activities are not psychogalvanic reflex phenomena.