FINLAND: Model Spy

Through locked doors and a heavy screen of Finnish secrecy, it seemed last week that Finland, too, had scratched a U. S. citizen and found a spy. But Arvid Werner Jacobson. 27, onetime teacher in the Northville (Mich.) high school, had adopted a different technique from that of the Robert Gordon Switz's in Paris. Soon after his arrest by the Finnish political police last October on charges of high treason and espionage, the French Government let it be known that Jacobson and Switz were mixed up in the same far-flung spy ring....