Anthony Bailey, who followed the inland Waterway from Virginia to Florida earlier on, now jeeps through the great city from Boston to Washington. In something of an ecological exercise, he remarks on the various environments within the area and witnesses efforts to change them. At MIT he talked transportation (the Northeast Corridor project), at Leedsville, with Lewis Mumford, of ""conurbation."" He visited friends in ""the center of things""--New York, and went trail-clearing with the Sierra Club thirty miles out of the city. He visited depleted cities and burgeoning towns, spoke with planners and conservationists all along the route, looked over their shoulders at an impressive range of projects. It is a quick trip, but it gives a once over brightly of What is percolating along the Atlantic coast. There should be interest.