The intellectual concentration of Lothar Baumgarten’s work is contained in Die Namen der Bäume (The names of the trees), a book of found and original texts with photographs both from scientific literature and taken by the artist during a stay he made among South American Indians. His life among the Indians is the key to Baumgarten’s thinking about art, and also links up the works shown here. Baumgarten’s installations from the late ’60s are probably only now coming clear in their poetry of colors, materials, signs, and forms; Gran Sabana, 1969, for example, portrays the myth of the creation,