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."

Raymond shook his head. "On the contrary. We've merely repeated work that was first carried out more than eighty years ago. These techniques are far from new. But our application of them to—"

"Yes," Harker said weakly. "To human life. That's—that's the clincher, I'd say."