An electric motor rotates a drum in 15 minutes. The drum consists of a cork table to which germinating seedlings are pinned and has a perspex cover 105 x 100 mm (height x dia). A stand enables the angle of the cork table to be set at any desired inclination. Works on 240 V AC.

Metal body with heavy base, fitted with a 30 hour clock drive which rotates the plant holder at one revolution per hour. Can be set at any angle between horizontal and vertical positions, complete with plant holder.

Records growth of a plant as a series of horizontal traces, the gap between which represents one hour’s growth. The recording lever has 3 notches giving x5, x7 and x10 magnifications and is mounted on an adjustable pillar to adjust its height and pressure on the pencil tip. The recording drum has...

To measure plant growth rate. The recording arm 600 mm with a bristle tip at one end is mounted on an adjustable pillar enabling alteration of height and pressure of the bristle on a disc of 200 mm dia. The other end of the arm has three eyes to give x3, x4, x5 magnifications. A smoked disc is mo...

To show growth of plants and the effects of environment on the rate of growth. Comprises a lightweight metal pointer counterbalanced by a mass hanger & masses, with a large easily readable scale. Complete with stands, mass hanger and masses.

An aluminium case with glass sides to observe root development at different depths, with aluminium shutters to exclude light so that roots will grow down the inside of glass. Bottom panel has holes for drainage, Overall size 380 x 70 x 270 mm.

For experiments in phototropism with seedlings. Three-chambered case with channels to accept variety of shutters. One chamber has a window at top and back. Provided with clear, opaque and slot shutters and one orange and one blue filter. With three glass containers for seedlings. Overall size 180...

For experiments in phototropism. A stout cardboard black-lined box with aperture tube and end cap. Overall size 200 x 160 x 130 mm, side tube 110 x 50 mm dia.

Simple, Ganong’s.