Devil Crystals of Arret

The Pure pulp science-fiction adventure story. A scientist returns to his lab with his assistant, Larry, to find Joan his daughter standing in his Atomic Ray. Facing a six-hour deadline of death, young Larry raids a hostile world of rat-men and tinkling Devil Crystals. The girl had apparently only been awaiting their return to the laboratory for around her gray laboratory smock was already fastened one of their Silver Belts, and a cord was already in place running from her wrist to the main switch of the projection mechanism.