"I'd give a year off my life to...." Idle talk now, but it was ghastly reality to Kent! Howard Kent looked at his young and beautiful wife and felt the weight of the years rest on his shoulders. In her eyes he saw his heavily lined face and sagging, stooped shoulders. They stood just inside the long, narrow reception room of the Human Rejuvenation Plant. Potted palms and formal chairs reminded one of a Human Disposal unit. "I have a confession to make, darling," he said. "Oh, no, Howard. Not now