PROF. PIERSOL, Professor of Anatomy at the University of Pennsylvania, said: "I have been reading the book with the keenest interest, for it indeed presents many subjects in what to me at least is a new light. Every man of science looks to the beacon--truth--as his guiding mark, and every opportunity to replace even time-honored misconceptions by what is really the truth must be welcomed." _The Independent_ (New York) said: "Dr. Walsh's books should be read in connection with attacks upon the Popes in the matter of science by those who want to get both sides." OTHER BOOKS BY THE SAME AUTHOR FORDHAM UNIVERSITY PRESS SERIES MAKERS OF MODERN MEDICINE (second thousand). Lives of the dozen men to whom nineteenth century medical science owes most. Cloth, octavo, 362 pp., with portrait of Pasteur. New York, 1907: second edition, 1909. $2.00, net. THE POPES AND SCIENCE (second thousand). The history of The Papal Relations to Science during the Middle Ages and down to our own time. New York, 1908. $2.00, net. OLD-TIME MAKERS OF MEDICINE, in preparation. To be issued Winter, 1909. MAKERS OF ASTRONOMY, in preparation. THE DOLPHIN PRESS SERIES CATHOLIC CHURCHMEN IN SCIENCE (first series). Lives of Seven Catholic Ecclesiastics who were among the great founders of science. The Dolphin Press, Philadelphia, 1906. Price, $1.00, net. CATHOLIC CHURCHMEN IN SCIENCE (second series). Lives of four great clerical founders in science and clerical pioneers in electricity and Jesuit astronomers. The Dolphin Press, Philadelphia, 1909. Price, $1.00, net. * * * * * THE THIRTEENTH GREATEST OF CENTURIES (second edition, third thousand). The story of the rise of the universities, and of the origin of modern art, letters, science, liberty and democracy in a single century. Catholic Summer School Press, New York, 1907. $2.50, net. IN COLLABORATION ESSAYS IN PASTORAL MEDICINE. O'Malley and Walsh. Medical information for pastors, superiors and nurses, and applications of ethical principles for physicians, judges, lawyers, etc. Longmans, Green & Co. (fourth thousand), New York, 1906. $2.50, net. Transcriber's Notes: Page 5, "passings" changed to "passing" (...nails from passing ships and how wooden pegs were substituted for nails in vessels...) Page 27, "Conville" changed to "Gonville" (Gonville and Caius, Cambridge) Page 36, added word "of" (...contribute effectively to the advancement of learning.) Page 98, changed "Philosphical" to "Philosophical" (Philosophical Transactions) Page 145, changed "formal" to "former" (...the muscle will recover the former motion...) Page 169, changed "inadventently" to "inadvertently" (...miss meals, and inadvertently to put off...) Page 206, changed "cicumstances" to "circumstances" (...that, under ordinary circumstances, all...)