Dr. Zahm's volume is a collection of the articles which he has recently contributed to various periodicals. These articles have only added to Dr. Zahm's reputation as one of the foremost living scientists within the Roman Catholic Church. Of special interest as indicating a drift in the direction of scientific study among Catholics are the papers on "Light and Liberty in the Study of Science" and "Roman Catholics and Scientific Freedom." –Review of Reviews and World's Work, Vol. 15 * * * * * Contents. CHAPTER I. Leo XIII. and Science CHAPTER II. Leo XIII. AND The Social Question CHAPTER III. The Vatican Observatory CHAPTER IV. Light and Liberty in The Study of Science CHAPTER V. Roman Catholics and Scientific Freedom CHAPTER VI. The Study of Science in Our Ecclesiastical Seminaries CHAPTER VII. The Forerunner and Rival of Pasteur CHAPTER VIII. Louis Pasteur and His Life Work CHAPTER IX. A New System of Writing for the Blind CHAPTER X. The Omar of The New World CHAPTER XI. The Site of The Garden of Eden