For his “Numbered Series,” 1988– , Joe Ziolkowski suspended more than 100 people upside down against a blank backdrop in his studio, photographing their nude torsos from the navel up. With this simple 180 degree reversal, Ziolkowski managed to blur individuality, emphasizing instead a kind of psychic abandon. Of the 20 pieces from this series shown here, only one depicted an individual struggling against his predicament, trying to pull his body upward to fight against the doped-up state this position usually induces. The other 19 participants seemed to accept being turned upside down more or