artillery of the Army of the Potomac will doubtless fill a conspicuous
place. These services were rendered to the commanders of divisions and
corps, giving them an historic name, and in their reports we may expect
the artillery to be honorably mentioned. General Barry says, in
conclusion,--"Special detailed reports have been made and transmitted by
me of the general artillery operations at the siege of Yorktown,--and by
their immediate commanders, of the services of the field-batteries at
the Battles of Williamsburg, Hanover Court-House, and those severely
contested ones comprised in the operations before Richmond. To those
several reports I respectfully refer the Commanding General for details
of services as creditable to the artillery of the United States as they
are honorable to the gallant officers and brave and patient enlisted
men, who, (with but few exceptions,) struggling through difficulties,
overcoming obstacles, and bearing themselves nobly on the field of
battle, stood faithfully to their guns, performing their various duties
with a steadiness, a devotion, and a gallantry worthy the highest
commendation."

REVIEWS AND LITERARY NOTICES.

_Mental Hygiene_. By I. RAY, M. D. Boston: Ticknor & Fields.

Dr. Ray, as many of our readers may know, is a physician eminent in the
speciality of mental disorders. He is at present the head of the Butler
Hospital for the Insane in Providence, Rhode Island. The four first
chapters of his book, chiefly relating to matters which may be observed
outside of a hospital, come under our notice. The fifth and last
division, addressed to the limited number of persons who are conscious
of tendencies to insanity, has no place in an unprofessional review.

This little treatise upon "Mental Hygiene" carries its own evidence as
the work of a disciplined mind, content to labor patiently among the
materials of exact knowledge, and gradually to approximate laws in the
spirit of scientific investigation. Mental phenomena are analyzed by Dr.
Ray as material substances are analyzed by the chemist,--though, from
the nature of the case, with far less certainty in results. Yet there is
scarcely anything of practical moment in the book which may not be found
in the popular writings of other prominent men,--such, for example, as
Brodie, Holland, Moore, Marcel, and Herbert Spencer. We say this in no
disparagement; there is no second-hand flavor about these cautious
sentences. Dr. Ray has