From the body of the small animal there emanated an intangible though hazily visible aura as the combined effects of the rays grew in intensity. Old Crompton bent over the table and peered amazedly at the stump of the foreleg, from which blood no longer dripped. The stump was healing over! Yes--it seemed to elongate as one watched. A new limb was growing on to replace the old! Then the animal struggled once more, this time to regain consciousness. In a moment it was fully awake and, with a frightened hop, was off the table and hobbling about in search of a hiding place. * * * * * Tom Forsythe laughed. "Never knew what happened," he exulted, "and excepting for the temporary limp is not inconvenienced at all. Even that will be gone in a couple of hours, for the new limb will be completely grown by that time." "But--but, Tom," stammered the old man, "this is wonderful. How do you accomplish it?" "Ha! Don't think I'll reveal my secret. But this much I will tell you: the life force generated by my apparatus stimulates a certain gland that's normally inactive in warm blooded animals. This gland, when active, possesses the function of growing new members to the body to replace lost ones in much the same manner as this is done in case of the lobster and certain other crustaceans. Of course, the process is extremely rapid when the gland is stimulated by the vital rays from my tubes. But this is only one of the many wonders of the process. Here is something far more remarkable." He took from a large glass jar the body of a guinea pig, a body that was rigid in death. "This guinea pig," he explained, "was suffocated twenty-four hours ago and is stone dead." "Suffocated?" "Yes. But quite painlessly, I assure you. I merely removed the air from the jar with a vacuum pump and the little creature passed out of the picture very quickly. Now we'll revive it." Old Crompton stretched forth a skinny hand to touch the dead animal, but withdrew it hastily when he felt the clammy rigidity of the body. There was no doubt as to the lifelessness of this specimen. * * * * * Tom placed the dead guinea pig on the spot where the rabbit had been subjected to the action of the rays. Again his visitor watched carefully as he manipulated the controls of the apparatus. With the glow of the tubes and the ensuing haze of eery light that surrounded the little body, a marked change was apparent. The inanimate form relaxed suddenly and it seemed that the muscles pulsated with an accession of energy. Then one leg was stretched forth spasmodically. There was a convulsive heave as the lungs drew in a first long breath, and, with that, an astonished and very much alive rodent scrambled to its feet, blinking wondering eyes in the dazzling light.