With practiced, efficient motions the surgeon slit the animal's blood vessels, inserted tubes, adjusted clamps. An assistant glided forward from the corner of the room to help. Harker found a strange fascination in watching the life-blood drain from the dog into dangling containers. The needle registering the heartbeat sank inexorably toward zero; respiration dropped away. At last Vogel looked up and nodded. "The dog is dead," he declared. "The blood has been drained away. This pump will ensure oxygenation of the blood during the period of the animal's death. We will now proceed to the next table--" Where, Harker saw, another dog had been placed while his attention had been riveted on the death scene. This dog lay in a slumped furry heap that grotesquely reminded Harker of Eva as she had looked when they pulled her from the sea. His throat felt terribly dry. "This animal," Vogel said stiffly, "underwent the killing treatment nine hours and thirteen minutes ago. Its blood has been stored during that time. Now--" Spellbound, Harker watched the surgeon's busy hands as he and the assistant fastened tubes to the dead animal's body and lowered a complicated instrument into place. "We are now restoring blood to the dead animal. When the indicator gauge reads satisfactorily, injection of adrenalin and other hormones will restore 'life' to the animal. The blood is being pumped back at the same rate and rhythm that the animal's own heart uses." "In some cases," Raymond remarked, "we've restored animals dead nearly thirty-six hours." Harker nodded. He was forcing himself to a realization of the gulf that lay between these calmly efficient men and himself. Yet they needed him and he needed them; neither type of mind was complete in itself. The resuscitation of the second dog took fifteen minutes. At length Vogel nodded, withdrew the reviving apparatus. The heartbeat indicator was fluttering; respiration was beginning. The dog's eyes opened wearily. It wagged its tail feebly and almost comically. Lurie remarked, "For the next several hours the dog will show signs of having undergone a serious operation--which it has. In a day or two it'll be as good as new--once the stitches have healed, of course. In Lab Building Two we can show you dozens of dogs that have been through the killing process and were returned to life, happy, hearty--" "This dog," Raymond said calmly, "is the _son_ of a dog we temporarily 'killed' two years ago. The period of death doesn't seem to interfere with later mating or with any other life-process." While they spoke, Vogel was repeating the process of revivification on the dog that had been killed twenty minutes before. This time Harker watched with less revulsion as life returned to the animal. In a dry voice he said, "Your experiments--are--well, impressive."