By merging streamlined geometrical form with an environmentally responsive function Roger Berry creates some of the most inventive steel sculpture currently being produced in the Bay Area, particularly in the genre of public art. The dynamism of the work springs from its dualities, chiefly the contrast between the sculpture’s appearance and its interactive intention. Berry’s neo-Constructivist shapes and industrial medium bespeak Modernity. His simple, monumental open circles, spheres, planes, and cones are reductively abstract, while less angular and more lyrical than Minimal art per se. But