Language has been a primary element in visual art since the 1960s -- in the form of printed texts, painted signs, words on the wall, recorded speech, and more. In Words to Be Looked At, Liz Kotz traces this practice to its beginnings, examining works of visual art, poetry, and experimental music created in and around New York City from 1958 to 1968. In many of these works, language has been reduced to an object nearly emptied of meaning. Robert Smithson described a 1967 exhibition at the Dwan Gallery as consisting of "Language to be Looked at and/or Things to be Read." Kotz...