A vitrigraph kiln is a small kiln usually raised at or above shoulder level. Within the kiln is a crucible and a shelf -- both with holes in their bottoms. When the glass is heated sufficiently to flow a thin stream of glass flows out the bottom of the vitrigraph and down toward the floor.
The artist is able to manipulate the stream as at cools, creating glass "lines" that can be incorporated as components in other glass work.
