CLAUDE SHANNON Bell Laboratories, Murray Hill, N

I think this machine -may be of interest in view of its connection ...:h the problems of trial-and-error learning, forgetting and feedback _ ems. The maze can be changed _ any desired mantler by rearranging the partitions between the twen --:five squares. In the maze there is a sensing finger, which can feel the -.:titions of the maze as it comes against them. This finger is moved .- The goal is mounted on a pin which can be slipped into a jack _ any of the twenty-five squares.