Minnesota highway commission version with the preferred solar panel and storage battery was in the basement. (Because of its remore Route 169 location, it was later destroyed by vandals.) The two part speaker system in the lobby offered visitors options. Standing passively below the ceiling speakers you could hear mixed sounds from all the trees. An interactive speaker was hung on a lobby wall and with the aid of instructions hanging nearby you could call up -activate- available soundings from three originating sources, The third one would have been the atmospheric PAM construction and was to have been located centrally on the roof. Objections were raised during the mid process and it was decided to cancel this commision aspect. Lightning strikes were cited; however, there were myriad reasons stated and of course this was a major blow. Rounding out specifics, the vibrational sound monitoring from the stainless steel strands in the solar-powered draft monitror- on roof with a 1 inch copper frame- could also be mixed, at the lobby console, with the other parabolas "straight line of sight sound collections:" sound being passaround andi anything falling in focus within their focalized listening pathway, or from the trees, could be bemonitored. A total of four parabolas were used with each faceing in a N. S. E or W. -or cardinal points. Inside, a master control received all sounds from sensors placed on braches in the trees and elsewhere- and FMd to the lobby console..