Issue edited by Philip Leider. Essays "Two Contributions to the Art and Science Muddle: 1. Constructivism and its Confusions," by Terry Fenton; "2. A Report on a Symposium," by Grace Marmor Spruch; "Late Fifties at the Ferus," by Billy Al Bengston; "Charles Sheeler, American Pastoral," by Hilton Kramer; "Edward Avedisian's New Paintings," by Alexandra C. Anderson; "Problems of Criticism V: The Politics of Art, Part II," by Barbara Rose; "The San Francisco Annual Becomes an Invitational," by Knute Stiles. Reviews by Rosalind Krauss, Robert Pincus-Witten, Emily Wasserman, Jerrold Lanes, Whitney Halstead, Palmer D. French, Jane Livingston, Manny Farber. Letter by Robert Smithson. Includes a review of Eva Hesse's first show at Fischbach Gallery.