from the air, that were hung on the wall near bins of rocks or dirt from the actual site. He presented two versions of the place--site and Nonsite (the gallery or museum where the piece was kept). The idea was "subtraction (from the site) versus addition (from the 'Nonsite')." In the Nonsites, Smithson rearranged the pieces of the site in geometrical boxes. In Chalk Mirror Displacement the material from the site is rearranged by putting it in a pile (after it had already been dug out of the earth) and is duplicated (like in the Nonsites' photographs) by the reflections in the mirror.
The third kind of artwork that Smithson did at this time is the "mirror and salt pieces" and Fineberg shows one called Rock Salt and Mirror Square (1969). In this piece, a shallow, square, closed box made of mirrors is surrounded by piled up rock salt. The rock salt is in different sizes--from very small pieces like powder to larger rocks. There are also rocks and salt scattered on the mirror top of the box. This piece is temporary too. According to Fineberg, "the salt slowly dissipates when it is exposed to the air." In the use of mirrors and rocks, and in being temporary, this work also resembles Chalk Mirror Displacement a great deal. But it was not first made at the site. Instead it was constructed in an art gallery. Chalk Mirror Displacement is similar to all these works, and different from them in several ways. It could definitely be called
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