Another meaning of the dream should be pointed out. His neurosis must be represented by some person or object in the dream. Asked what the engine suggests to his mind the subject answers: my illness. The glass-covered porch: the transparency of his trouble; the engine: his neurosis. The subject habitually compares his body to a steam engine, especially his stomach. He shows various effects of starvation: unable to eat, he loses weight, and looks like a skeleton because he wants to starve out his sexual longing and punish himself for his sinful passions. This man had built for himself a marvelous safety valve in his neurosis. When he thinks of going to meet a girl, he gets such a severe attack of gastric pain that he must give up the appointment. The gastric discomfort is induced beforehand through excitement and inability to eat. The clever staging of his gastric trouble is noteworthy. Nausea and vomiting are first induced to prevent the taking of food. Then hunger supervenes and that gnawing sense of hunger, spoken of as gastric cramps, becoming so strong as to overshadow the heart affair. The craving for food becomes more obsessive than the desire for woman. These episodes are followed by a ravenous appetite. He recalls that after the first dream he woke up with a terrible hunger. This hunger was even stronger after the second dream but disappeared after the pollution. I have already maintained in my work on _Morbid Anxiety_ that hunger may stand as a substitute for sexual libido and here this is clearly shown and illustrated. Now we understand the firing of the engine with the paper packages. The caloric value of paper is as small as that of nutrition, when the latter is substituted for sexual desire. Thus he makes use of his stomach as a remarkable safety valve. He starves himself out because the gratification of food serves as a substitute for sexual gratification. He relates a number of incidents showing how cleverly his neurosis serves him. Every woman he meets excites him but even when he goes so far as to arrange an appointment with one and she agrees to call at his residence or to go to a hotel he stops short of actual intimacy. From the standpoint of the analysis the prognosis is unfavorable. He does not want to give up the neurosis, his safety valve, he wants to keep up his own way of “firing the engine” and wishes the physician were out of the way. Indeed, he continues to have recourse to masturbation, he endures the consequent regrets and self reproaches, rather than give up his defence.