This book answers in the light of the discovery of modern science the questions frequently asked as to the probable end of human life on this planet. Moreover, it goes a step further in making clear the relations of man's life to the universe life. We have already seen that "mind" is but another form of "life." Dr. Meyer shows that not only animals and plants but even worlds and suns have their birth, growth, maturity, reproduction, decay and death, and that death is but the preparation for a new cycle of life.

4. Science and Revolution: A Historical Study of the Evolution of the Theory of Evolution. By Ernest Untermann. Cloth, 50 cents.

A history of the evolution of the theory of evolution, from the earliest scientific writings that have been preserved, those of the Greek philosophers, down to the present time. The author shows how the ruling classes, living on the labor of others, have always supported some form of theology or mysticism, while the working classes have developed the theory of evolution, which is rounded out to its logical completion by the work of Marx, Engels and Dietzgen. The author frankly recognizes that no writer can avoid being influenced by his class environment, and he himself speaks distinctly as a proletarian and a Socialist. "Science and Revolution" is an essential link in the chain of evidence proving that conclusions drawn by Socialists from the facts of science.

5. The Triumph of Life. By Wilhelm Boelsche. Translated by May Wood Simons. Cloth, 50 cents.

The German critics agree that this book is even more interesting than "The Evolution of Man," by the same author. It tells of the struggle of life against its physical environment, and introduces a wealth of scientific detail charming set forth. The German original contains no illustrations, but our edition is fully illustrated with pictures that aid materially in an understanding of the text.

6. Life and Death, a Chapter from the Science of Life. By Dr. E. Teichmann. Translated by A. M. Simons. Cloth, 50 cents.

A study of how life begins and how it ends. It does not duplicate any other book in this series, but is a special investigation into the laws which govern the reproduction of life. It also deals with the methods by which the life of each separate individual is brought to an end, and shows that in an overwhelming majority of cases throughout the whole animal kingdom death is violent rather than "natural." Even among human beings a really "natural" death is rare. The author suggests that with improved conditions of living, most premature deaths may be prevented, and that in that event the fear of death, which causes so much of the misery of the world, may disappear.

7. The Making of the World. By Dr. M. Wilhelm Meyer. Translated by Ernest Untermann. Cloth, 50 cents.

This is a companion volume to "The End of the World," and traces the processes through which new suns and new worlds come into being to take the place of those that have grown old and died. It is an essential link in the chain of evidence proving that the human mind is not something apart from nature but only another manifestation of the one force that pervades all "matter." The book has twenty-four illustrations, for the most part reproductions of telescopic photographs, which make the truth of the statements in the book evident to every reader.

THE INTERNATIONAL LIBRARY OF SOCIAL SCIENCE.