In her dissertation some points for the differentiation of the pathological lie have been added to those offered by Delbruck, Risch, Koppen, and Vogt. The pathological liar lies, not according to a plan, but the impulse seizes him suddenly. This propensity grows stronger. Under strict supervision it comes to only an abortive attack, similar to what happens in cases of dipsomania, or of tendency to rove in which the repressed outbreak expresses itself in tormenting psychical and physical unrest. While the normal liar and swindler is forced to be on his guard lest he divulge something of the actual state of affairs, and is therefore either taciturn or presents an evil and watchful appearance, or, if a novice at his trade, is hesitating in his replies, the pathological liar has a cheerful, open, free, enthusiastic, charming appearance, because he believes in his stories and wishes their reality. The inconsequential way in which such persons go to work is to be explained by the fact that consciousness of the real situation is partly clouded in their minds. In any special act it is impossible to say whether the consciousness of the lie, fancy, or delusion preponderates. Inability to remember delinquencies Stemmermann regards also as added proof of pathological lying. She speaks of another class of prattlers, chattering people that might be confounded with pathological liars from the stories they tell in full detail. But they have no system which they develop, often change their subject and do not paint in a lifelike way because they do not believe their own stories or live in them in a self-centered manner. Of the 17 cases Stemmermann studied from the literature (Delbruck, Hinrichsen, Jorger, Redlich, Koelle, Henneberg , Wellenbergh) 10 were periodic. Of her own 10 cases, 6 were periodic. Sex abnormalities were present in 5 out of the 17 in the literature. Among possible causes of pathological lying she places any factor which narrows consciousness and increases suggestion and weakness, such as pregnancy, overexertion, chronic alcoholism, monotonous living, long, close work, head injuries. Concerning prognosis she finds little detailed in the literature. The general opinion is that such cases arising from a background of degeneracy are incurable. One of her cases was free from attacks for two periods of three years each, and had been blameless in an honorable position as editor for seven years at the time of the publication of her monograph. She suggests that the profession he has chosen may be particularly suited to the talents of the pathological liar. She also ventures to state that where pathological lying is merely an accompaniment of puberty it may disappear.