16. Science has caused many things once held to be historical to be now considered doubtful. Thus it is asked-- 17. Would not the results of the French Revolution, which cost so much bloodshed, have been obtained without violence later, through gradual evolution? And were the results of the French Revolution worth the cost of the terrible barbarism and suffering that took place? 18. To understand the people in a revolution we must know their history. 19. The accumulated thought, feeling, and tradition of a nation constitute its strength, which is its national spirit. This must not be too rigid, nor too malleable. For, in the first place, revolution means anarchy, and, in the second place, it results in successive revolutions. WAR AND PEACE STUDIES. By the Author. Peace, War, and Humanity. Printed by Judd & Detweiler, Washington, D. C., 26 pages, 1915, 8º. Comparative Militarism. Reprint from publications of the American Statistical Association, Boston, December, 1915, 3 pages, 8º. Atrocities and Outrages of War. Reprint from the Pacific Medical Journal, San Francisco, April, 1916, 16 pages, 8º. Gives data for Civil War, Boer War, Bulgaria, and Russia and Germany, 16 pages, 8º. Some Moral Evils of War. Reprint from Pacific Medical Journal, San Francisco, August, 1916, 8 pages, 8º. Refers especially to Boer War. Reasons for Peace. Machinists' Monthly Journal, Washington, D. C., July, 1916, pages 708-710, 8º. Choosing Between War and Peace. Reprint from Western Medical Times, Denver, Colo., 6 pages, 8º. Statement of European War. Reprint from Pacific Medical Journal, San Francisco, Calif., February, 1917, 8 pages, 8º. Prevention of War. Reprint from CONGRESSIONAL RECORD, Washington, D. C., February 27, 1917, 8 pages, 8º; also, reprint 7 pages, 8º. Military Training in the Public Schools. Educational Exchange, Birmingham, Ala., February and March, 1917. War and Criminal Anthropology. Published in the CONGRESSIONAL RECORD for February 27 and March 15, 1917. Our National Defense. Testimony of American officers as to difficulties of invasion, and our coast defenses. CONGRESSIONAL RECORD for March 15, 1917; also, reprint, 10 pages, 8º. Identification of Soldiers After Death and Head Measurements. Boston Medical and Surgical Journal, June 13, 1918; also, reprint 8 pages, 8º. Revolutions. Journal of Education, Boston, Mass., December 26, 1918, 4º. Anthropometry of Soldiers. Medical Record, New York City, December 14, 1918; also, reprint 17 pages, 12º; also, in Our State Army and Navy, Philadelphia, April, 1919. Psychology of Swiss Soldiers. Arms and the Man, Washington, D. C., 1918; also in Journal of Medicine and Surgery, Nashville, Tenn., March, 1919. International Psychology and Peace. Chicago Legal News, May 1, 1919.