Ghost Glass. Circa 1940s. A sheet of glass in a small chromed frame is seen to be solid. An arm at the center of the glass is twisted into any position chosen by a spectator and a needle is pushed through it ? and the glass. When removed, the glass is shown to be solid again. 4 x 4". The original model devised by Richard Himber; later versions were manufactured from plastic and showed the corners of the glass outside the frame. RARE.