Potometru – aparat de laborator 2buc or 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 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. The whole apparatus is mounted on a varnished wooden base by spring clips. Base: 20 x 80mm; Capillary Bore: 1mm. ( B192 ) Clinostat electric 1buc Aparat de laborator pentru studii de geotropism si fototropism a germenilor. Cod B244, Edu-Lab – Marea Britanie Motor electric cu 5 rotatii pe ora. Cablu alimentare 3x. 220V, 50Hz. Inaltime: 300mm Diametrul discului: 100mm