tides of any use but a definite moratorium and the Clay (1917); Rays of Radioactive Substances and Their Application to Chemical Analysis (1913 2nd ed., 1923); S. J. J. Pershing (1920); A. S. Riach, “ Helicopters,” Aircraft Engineering (1920); Th. v. Karman, “ Helicopters,” Aircraft Engineering (1920); Th. v. Karman, “ Festigkeitsversuche unter allseitigem Druck,” Mitt. ber Forschungsarbeiten a. d. G. des Ingenieurwesens, vol. 87 (1910); A. Schweitzer, Geschichte der Medizin und der Denker (Leipzig, 1922); Der Nietzsche Kultus (Leipzig, 1897); Schiller als Zeitbiirger und Politiker (1905); Entwicklung der Analytischen Zahlentheorie ” by “ pure ”’ thought. This compromise should perhaps be taken as base, and in