ARTS AND SCIENCES

OR

Fourth Division of "The English Cyclopædia,"

CONDUCTED BY

CHARLES KNIGHT.

VOLUME I.

LONDON:

BRADBURY, EVANS, & CO., 11, BOUVERIE ST., FLEET ST., E.C.

SCRIBNER, WELFORD, & CO., 654, BROADWAY, NEW YORK.

1866.

MENTAL PHILOSOPHY.