The present invention comprises an educational device for use with an earth globe having ecliptic angle of inclination for teaching students the position of the earth relative to the sun through the various seasons. The present invention can be used for rehabilitation of neuromotor disorders, such as a stroke. Also provided by the invention are tissue cultures of the soybean variety 4785923 and the plants regenerated therefrom. An AD converter connected to the RF processing function digitizes the interference signals and desired navigation signals and provides a digitized IF signal. In order to allow the back plate to fit in the gap between taps and tower, the thickness of the back plate is no more than the first distance and in presently preferred embodiments and best modes now contemplated is in fact less than the first distance.