Touch Boards - 1MM.031
Set of three wooden rectangular boards'with a rough of smooth surface as follows : a) a board with half the surface smooth and
half rough b)a board witha series of alternating rough and smooth strips c) a board with a series of rough strips arranged in gradation
Touch tablets - 1MM.032
Set of six matching pairs of wooden tablets that are covered with sand paper of varying grades of roughness, in a wooden box. Each pair is colour coded on the
back for a control of error
Touch Boards - 1MM.031 Touch tablets - 1MM.032