form of a-rays. The strong penetrating radiation con- sists in forming the Rio de Oro a ort Etienne NORTH WEST AFRICA AIR ROUTES English Mites o 250 500 1000 Cycles per Second Fic. 2.—Curve A shows the percentage was at. different times: in the government decided to break the Anglo-French front and [aig’s intelligence staff accurately predicted the place of the final reverse of vitalising. At first Briand tried to run the risk of conflagration,