Sky art sculpture called "Light Line Experiment" exhibited at the Briggs Athletic Field, Massachusetts Institute of Technology, on May 22, 1968, 7 to 11 p.m.; sponsored by the Center for Advanced Visual Studies and Committee on the Visual Arts, MIT. A 1,000-foot-long, helium-inflated, transparent polyethylene hose, two feet in diameter, composed of four links of hose, each 250 feet long, tied together to form one long line and illuminated in motion in the night sky by a 20 KW arc light.