To measure transpiration, without breakage. Only one glass component (the capillary tube) and is mounted on a strong backing plate. It consists of a capillary tube with millimeter scale connected via a three way tap to a syringe. The cut shoot is connected to the third outlet. It can also be used to measure humidity by connecting a porous pot to the third outlet. Dimensions overall 155 × 165 × 60mm (width × height × length). Capillary tube 120 × 1mm ( length × bore).

Comprises a graduated, narrow bore, horizontal glass measuring tube with a vessel for a plant shoot at one end and having a vertical limb with a stopcock and a funnel fitted by a ground glass joint. Mounted on a wooden stand. For Demonstration, of transpiration rates and rates of water absorption by a cut shoot under various external conditions. A plant shoot is sealed into a stopper which fits the end tube, and the whole apparatus is filled with water, the open end of the capillary tube, which is graduated in millimeters, dipping into a beaker of water. The position of the air bubble may easily be adjusted by opening the glass stopcock to admit water from the central reservoir. The whole apparatus is mounted on a varnished wooden base by spring clips. Comprises a graduate, narrow bore, horizontal glass measuring tubes with a vessel for plant shot at one end and having a vertical limb with a Teflon stopcock and a funnel fitted by a ground glass joint. Height to top of reservoir 170mm, Diameter of reservoir 20mm Length, overall 320mm, Base 320×80mm(L × W), Capillary bore 1mm

 ELB1311-1 On wooden stand.

 ELB1311-2 On Plastic stand

Takes one revolution every 15 minutes for 24 hours in vertical or horizontal position. The plant is sown in the pot, with clock movement on heavy metal base. With ON / OFF mechanism.

For demonstrations of heliotropism and geotropism. Germinating seedlings are pinned to the cork table which is rotated by an electric motor at 5 revolutions per hour 220-240V, 50-60Hz, 5W. The motor is spindle mounted and may be clamped by a thumbscrew so that the plane of the table can be set at any angle. Slow rotation in the vertical or horizontal planes cancel out the effect of gravity and directional light. An acrylic cover is provided for the cork table to shield the seedlings from draughts. Diameter of cork disc is about 100mm.