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 millimeter, 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 reservior. The whole apparatus is mounted on a varnished wooden base by spring clips.
Height to top of reservoir 170mm Diameter of reservoir 20mm Length, overall 320mm Base 20 x 80 mm length x width Capillary bore 1mm As above but on Bakelite Stand