One-fifth of Kraepelin's cases became chronic. Bonhöffer described a paranoid type of long duration. The hallucinoses appear usually earlier in life than Korsakow's psychosis but later than delirium tremens. In Kraepelin's experience delirium tremens is three times as common as are hallucinoses. He looks upon these two conditions, however, as different clinical manifestations of "one and the same" disease process. Alcoholic paralysis, so called, is a mixture of chronic alcoholic symptoms with those of general paresis. There is a mental deterioration with ideas of grandeur, emotional dulness, hallucinations, delusions of jealousy, speech defect, tremors and polyneuritis. Epileptiform attacks are frequent. Most of these forms according to Kraepelin belong to Korsakow's psychosis or polioencephalitis hemorrhagica superior. Alcoholic conditions may also be complicated by syphilis or arteriosclerosis. Since the alcoholic psychoses have been generally recognized as such, there has been comparatively little difference of opinion as to their differentiation. The classification of the American Psychiatric Association is as follows:— "The diagnosis of alcoholic psychosis should be restricted to those mental disorders arising, with few exceptions, in connection with _chronic_ drinking and presenting fairly well defined symptom-pictures. One must guard against making the alcoholic group too inclusive. Overindulgence in alcohol is often found to be merely a symptom of another psychosis, or at any rate may be incidental to another psychosis, such as general paralysis, manic-depressive insanity, dementia praecox, epilepsy, etc. The cases to be regarded as alcoholic psychoses which do not result from chronic drinking are the episodic attacks in some psychopathic personalities, the dipsomanias (the true periodic drinkers) and pathological intoxication, any of which may develop as the result of a single imbibition or a relatively short spree. "The following alcoholic reactions usually present symptoms distinctive enough to allow of clinical differentiation: "(a) Pathological intoxication: An unusual or abnormal immediate reaction to taking a large or small amount of alcohol. Essentially an acute mental disturbance of short duration characterized usually by an excitement or furor with confusion and hallucinations, followed by amnesia. "(b) Delirium tremens: An hallucinatory delirium with marked general tremor and toxic symptoms. "(c) Korsakow's psychosis: This occurs with or without polyneuritis. The delirious type is not readily differentiated in the early stages from severe delirium tremens but is more protracted. The non-delirious type presents a characteristic retention defect with disorientation, fabrication, suggestibility and tendency to misidentify persons. Hallucinations are frequent after the acute phase.