I remeber seeing this exhibit when I was in High School, around 1971 or 72. It was in one of the old Worlds Fair buildings that had been converted to a small museum of the City of New York. You sat in a small, moving car that road in a track around the perimeter of the display, ostensibly simulating a helicopter ride around the city. I have no idea if this is still there but it was really fabulous. Elana Benamy Collection Manager, Invert. Paleo., Acad. of Natural Sciences, Phila. [log in to unmask]