The open end of the capillary tube is dipped 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 reservoir.
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 whole apparatus is mounted on a varnished wooden base by spring clips.
Base: 20 x 80mm

Ltekonline are the manufacturers of Ganongs Potometer Apparatus Plant Laboratory Equipment Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Biology Laboratory Equipment for Engineering Teaching Lab in Universities