An Elementary Text - Book of the Miscroscope. By J. W. Griffith,
M.D., F.L.S. (John Van Voorst.)—One of the numerous works called forth by the taste for microscopic investigation which has become popular of late. It is mainly devoted to the description of the various methods of mounting and preparing objects, in which its principal feature is the addition of numerous coloured plates of the various objects recommended to the student, so that they may be easily recognized. and identified. Dr. Griffith's book appears to be a useful manual.