What starts off somewhat playfully with a trio of instrumentlike wall sculptures soon takes a turn toward the menacing. The sculptures in Williams’s show “appositions: still / birth / shit” incorporate a staggeringly wide range of materials, such as molted snakeskin, razor blades, carved wood, hardware, root clusters, wires and rope. Most creepy is synesthesia, a long, narrow piece of wood embedded with two circular speakers surrounded by metallic teeth.