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at one location -- the confluence of Rock Creek and the Potomac River -- seeing the land, animal, and plant forms at each period and experiencing the changes that occurred over time.

Integrated exhibits will combine the central theme of environmental change with the major concepts of ecology, using examples of similar changes occurring throughout the country. Some of the subjects explored are energy shifts from sun to carbon fuels, introductions and extinctions of flora and fauna, land comparisons, and migrations of people. The purpose of the exhibition is the help the visitor understand the delicate relationships of all the life systems, to see man's place as one of those systems, and to know what options there may be for the future. [[underlined]] Ecology 200 [[/underlined]] will also serve as an orientation to the rest of the museum, referring the visitor to other exhibitions for further study of related subject matter.

III. [[underlined]] Centennial - 1876 [[/underlined]]

This exhibition in the Arts and Industries Building (A&I) will recreate the character of the late nineteenth century and the Smithsonian's first National Museum. The Smithsonian, as part of its buildings improvement program, is currently restoring and modernizing the building, and installing air-conditioning. When the collections of the National Air and Space Museum are moved, final restoration of the exhibit areas will be completed.

[[underlined]] Centennial - 1876 [[/underlined]] will then be mounted in the building which was originally opened in 1881 to house objects displayed at the Centennial Exhibition in Philadelphia. The feeling will be much like that of Victorian extravaganza with the great variety of objects displayed totally dominating the spaces; banners, flags, bunting, and signs seen in 1876, wooden benches for visitors to rest on, and the sounds of nineteenth-century music in the air. The exhibits will be contained in the building's four major halls and created around the Centennial 1876 system of classification -- Manufacturers in the North Hall; Foreign Exhibits, Agriculture and Horticulture, U.S. Government and State Exhibits in the South Hall; Machinery, much of it working, in the East Hall; and finally, exhibits on Women, the Arts, Mining and Metallurgy, Education, and Science in the West Hall. The focal point will be the central rotunda where visitors will see a hydraulic display powered by pumping engines in the Machinery Hall. The Centennial celebrated a period of major technical and industrial accomplishment, and it