Means for the Prolongation of Life. Third and Enlarged Edition of a Lecture Delivered Before the Royal College of Phy sicians on Dec. 3, 1903.

There is nowhere to be found a more rational and succinct account of the hygiene of mature life than is contained in the 200 pages of Sir Hermann Weber's book, which with the present issue reaches its third edition. Weber refrains from any detailed description of the underlying pathology of senescence and avoids discussion of the abstruse problems surrounding that subject, which have lately engaged the attention of Metchnikoff, Minot and others. The book aims to accept the facts of the situation without controversy, and on a practical basis to lay down the rules of hygiene best adapted to preserve health and vigor in old age and postpone the advent of senility. There is a directness and simplicity about the manner in which the subject is developed that makes this little book an interesting and impressive one. The language is simple, dignified and untechnical. The book can be recommended to