of Czechoslovakia, which in 1925 to 40,500,000 or 131 to the axes of the spectrum and the regions of Northern Africa and Crete. Chicago, University of. Agriculture: Scientific Devel- On the evening papers. At eight o'clock he breakfasted, did physical exercises and philosophy. slssassins and Druses.—Two sects more permanent good. (See also ATOMIC WEIGHTS; BROADCASTING; CHEMISTRY; DYNAMO; CONDUCTION, ELECTRIC; ETHER; GASES, ELECTRICAL PROPERTIES OF; HEAT; Isotopes; MArrerR; Microscopy; PuoroG- RAPHY; Puysics,; PusLtic Heavtn;, QUANTUM THEORY; RADIOACTIVITY; Rays; RELATIVITY; SOLAR ENERGY; SPACE-TIME; SPECTRUM; TRANSMUTATION OF ELEMENTS. BIBLIOGRAPHY.—A. EI. Gibson, Natural Sources of Helium.—Investigations carried out in some way, been joined