The experts chosen by the courts discovered nothing that enabled them to determine the engine employed in the work of destruction. According to their conjectures the new explosion emanated from a gas which radium evolves, and it was supposed that electric waves, produced by a special type of oscillator, were propagated through space and thus caused the explosion. But even the ablest chemist could say nothing precise or certain. At last two policemen, who were passing in front of the Hotel Meyer, found on the pavement, close to a ventilator, an egg made of white metal and provided with a capsule at each end. They picked it up carefully, and, on the orders of their chief, carried it to the municipal laboratory. Scarcely had the experts assembled to examine it, than the egg burst and blew up
