Today many sophisticated pieces of medical hardware are coming out of the laboratory and into the hospital, among them kidney machines, artificial hearts, and monitoring devices for coronary victims. But these machines are often very expensive and may tie up capital in the treatment of chronic illness, capital which could be used for other, perhaps equally urgent, cases. How does international medical opinion see the outcome of this dilemma? Also: Phantoms Incorporated - Radiation studies, manned spaceflight experiments, and accident research all depend, for many of their results, on ' Phantoms.' These are substitutes for humans that give valuable information on the limits of tolerance of the human body. Horizon looks at their manufacture and functions.