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The object of this work is to consider the clinical history of the chronic convulsive diseases of the latter class which depend on such conditions of the nerve centres as elude detection by the methods of examination at present at our disposal. In considering these diseases it will, however. Be necessary to refer to' many facts relating to the organic diseases of the brain. There is, moreover) one class of convulsions due to organic brain disease which it has seemed well to consider more fully, namely, those which succeed an attack Of hemiplegia from which a more or less complete recovery has taken place.
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