Abstract: A universal module assembly includes a pressure vessel having cylindrical side walls and curved end surfaces. A rigid external supporting framework is attached to the exterior of and surrounds the pressure vessel. The framework includes a main body portion disposed around the cylindrical side walls, and end portions covering the curved end surfaces of the pressure vessel. The main body portion of the framework is in the general configuration of a right hexagonal prism, and the end portions of the framework are generally frustoconical. The framework is provided with access ports on one or both of its end portions and/or on one or more sides of the main body portion to facilitate interconnecting two or more of the module assemblies end-to-end, end-to-side, or side-to-side. Vessels of interconnected module assemblies can be communicated with one another in a pressure-tight state.

Abstract: A state of relaxation or mental harmonization in a subject is created by exposing a color solely to one field of vision of a subject and the complement of that color solely to the other field of vision of the subject while simultaneously exposing an audible tone solely to one ear of the subject and a harmonious tone solely to the other ear of the subject. The color and tones employed are subjectively comfortable and compatible. Preferably, the frequency difference between the two audible tones is one-half the frequency of the audible tone having the lowest frequency.