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." BY THE SAME AUTHOR FORDHAM UNIVERSITY PRESS SERIES MAKERS OF MODERN MEDICINE Lives of the men to whom nineteenth century medical science owes most. Second Edition. New York, 1910. $2.00 net. THE POPES AND SCIENCE The story of Papal patronage of the sciences and especially medicine. 45th thousand. New York, 1911. $2.00 net. MAKERS OF ELECTRICITY Lives of the men to whom important advances in electricity are due. In collaboration with Brother Potamian, F. S. C, Sc.D. (London), Professor of Physics at Manhattan College. New York, 1909. $2.00 net. EDUCATION, HOW OLD THE NEW Addresses in the history of education on various occasions. 3rd thousand. New York, 1911. $2.00 net. OLD-TIME MAKERS OF MEDICINE The story of the students and teachers of the sciences related to medicine during the Middle Ages. New York, 1911. $2.00 net. MODERN PROGRESS AND HISTORY Academic addresses on How Old the New. New York, 1912. $2.00 net. THE THIRTEENTH GREATEST OF CENTURIES 5th edition (50,000). 116 illustrations, 600 pages. Catholic Summer School Press, 1912. Postpaid $3.50. THE CENTURY OF COLUMBUS Why Columbus Discovered America in 1492. Catholic Summer School Press, 1914. Postpaid $3.50. THE DOLPHIN PRESS SERIES CATHOLIC CHURCHMEN IN SCIENCE First and second series, each $1.00 net. PSYCHOTHERAPY Lectures on The Influence of the Mind on the Body delivered at Fordham University School of Medicine. Appletons, New York, 1912. $6.00 net. [Illustration: Portrait] GUY DE CHAULIAC "The Prince of surgeons" (John Freund). "The Modern Hippocrates" (Fallopius). "His work is of infinite price" (Portal). "A masterpiece of learned and luminous writing" (Malgaigne). "It is rich, aphoristic, orderly, and precise" (Clifford Allbutt). "Chauliac laid the foundation of that primacy in surgery which the French maintained down to the nineteenth century" (Pagel). Chauliac is a good type of a medieval papal physician. Two of his well-known expressions were: "Sciences are made by addition and it is not possible that the same man should begin and finish them." "We are like infants at the neck of a giant, for we can see all that the giant sees and something more." [End Illustration] The Popes and Science THE HISTORY OF THE PAPAL RELATIONS TO SCIENCE DURING THE MIDDLE AGES AND DOWN TO OUR OWN TIME BY JAMES J. WALSH