For demonstration of heliotropism and geotropism, germinating seedings are pinned to the
cork table which is rotated by an electric motor. About 70mm dia cork linked disc, with fitting to take specimen tube
clear
plastic cover, angle adjustable from horizontal to vertical by a thumb screw, clock work motor which rotates 4
revolutions
per hour, 220V 50hz supplies. Complete with 3 core cable. Height about 30cm.
