Robert Morris, an influential theorist and artist, wrote a three part essay, “Notes on Sculpture 1-3”, originally published across three issues of Artforum in 1966. In these essays, Morris attempted to define a conceptual framework and formal elements for himself and one that would embrace the practices of his contemporaries. These essays paid great attention to the idea of the gestalt – “parts… bound together in such a way that they create a maximum resistance to perceptual separation.” Morris later described an art represented by a “marked lateral spread and no regularized units or symmetrical intervals…” in “Notes on Sculpture 4: Beyond Objects”, originally published in Artforum, 1969, continuing to say that “indeterminacy of arrangement of parts is a literal aspect of the physical existence of the thing.” The general shift in theory of which this essay is an expression suggests the transitions into what would later be referred to as Postminimalism.
In New York, Morris began to explore the work of Marcel Duchamp making pieces that directly responded to Duchamp’s (Box with the Sound of its Own Making (1961), Fountain (1963)). In 1963 he had an exhibition of Minimal sculptures at the Green Gallery in New York that was written about by Donald Judd. In 1964 Morris devised and performed two celebrated performance artworks 21.3 in which he lip syncs to a reading of an essay by Erwin Panofsky and Site with Carolee Schneemann. Morris enrolled at Hunter College in New York (his masters thesis was on the work of Brancusi) and in 1966 published a series of influential essays “Notes on Sculpture” in Artforum. He exhibited two L Beams in the seminal 1966 exhibit, “Primary Structures” at the Jewish Museum in New York.
(source: wikipedia)Box with the Sound of its Own Making (1961)