A finely machined brass cube having two holes is given for examination. One hole is large enough to allow a steel ball to pass completely through the cube, the other hole is smaller and threaded to accommodate a brass bolt, which is threaded through the cube and securely held in place with a brass nut. The steel ball is placed in the large hole and is seen to pass completely through the cube, having apparently penetrated the bolt, and emerges from the bottom. The entire apparatus may be examined. This Superb pocket trick is entirely self-contained, requires no skill and may be repeated as often as desired.
