The Homeostat

Abstract

The ultrastable system is much richer in interesting properties than might at first be suspected. Some of these properties are of special interest to the physiologist and the psychologist, but they have to be suitably displayed before their physiological and psychological applications can be perceived. For their display, a machine was built according to the definition of the ultrastable system. What it is, and how it behaves, are the subjects of this chapter.*