Tension Structure, Stage II by Kenneth Snelson Published February 18, 2015 at 338 × 443 in Making the invisible visible: Kenneth Snelson’s “Early X Piece” ← Previous Sculpture by Kenneth Snelson – iron, wire, tread and plasticine, 45 cm high; Release No.: BMC Doc. #4b-Snelson, Photographer Kenneth Snelson, Winter 1948. Courtesy of Regional Western Archives.