This section is from the book "Alcohol, Its Production, Properties, Chemistry, And Industrial Applications", by Charles Simmonds. Also available from Amazon: Alcohol: Its Production, Properties, Chemistry, And Industrial Applications.
Some affection of mind is usually present in chronic alcoholism. Commonly it is moderate in degree, and may be shown only in weakened will-power and failure of memory. In delirium tremens, more intense, but transitory, disorders occur; and in relatively rare instances alcoholism seems to be responsible for a chronic insanity with persistent delusions, usually of persecution and jealousy. " In general, however, the part which alcoholic excess plays in the causation of the ordinary forms of mental disease is of secondary importance: it has been shown that when the two things are associated, intemperance is more usually a symptom of insanity than its cause."1
 
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