THE TERROR IN THE AIR Did you ever hear before of Edison or Tesla untangling a baffling case or bank robbery? Craig Kennedy, scientific detective, is Edison and Tesla rolled into one. He knows the tricks of the laboratory; he is "wise" to the most minute details of the latest and most up-to-date scientific discovery; and he certainly likes the job of "jugging" a criminal by an experiment in electricity or a chemical reaction. In this story he goes way up in the air for his mystery, but, as usual, brings the criminal down to earth-hard. "THERE'S something queer about these aeroplane accidents at Belmore Park," mused Kennedy, one evening, as his eye caught a big headline in the last edition of the Star, which I had brought uptown with me. "Queer?" I echoed. "Unfortunate, terrible, but har

