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                            BY THE SAME AUTHOR.


    CEREBRAL HYPERAEMIA: THE RESULT OF MENTAL STRAIN
      OR EMOTIONAL DISTURBANCES. 16mo, cloth ... $1 00

    "Under the disguise of these hard words, Dr. Hammond presents a
    variety of admirable counsels, with regard to an excess of blood in
    the head, pointing out its causes, its symptoms, the mode of its
    medical treatment, and the means of its prevention."--_N. Y. Tribune._

    "The work is not only of interest to the medical man, but also is
    one easily understood and to be read with profit by brain-workers of
    all classes, whether in profession, in literature or business. It
    treats of the cause of headaches, the wakefulness, the illusions or
    delusions, and feelings of tightness in the