Nine cats were trained; two developed spontaneous experimental neuroses, while experimental neuroses were induced in the remaining seven. EST was administered using the Leduc current in an effort to compare results obtained with the sixty-cycle alternating current (conducted on other cats in previous experiments). The observations made and recorded during these experiments support the conclusion that EST disintegrates complex normal and neurotic patterns. The Leduc current does this to a lesser degree than the sixty-cycle current. It appears that 'the effects of various forms of EST on neurotic patterns correspond to the degree of concomitant disorganization of both "neurotic" and "normal" behavior'.