Half Leaf Experiment Royalty-Free Stock Photography

A glass bottle is fitted with a split cork and a branch with long green leaves is cut, and its cut end dipped into water contained in a beaker. A single leaf will also do. Pour a small quantity of caustic potash solution into the bottle and lay it on its side. The leaf is placed between the two halves of the cork in such a way that one half lies inside the bottle and the other half outside it with the petiole dipped into water contained in a beaker or a dish. The edges of the split cork should be smeared with vaseline and the bottle made air-tight. The fitting up of the apparatus is to be done in the early morning so that the experiment is done with a starch-free leaf. The whole apparatus is then exposed to light for a few hours, preferably till the evening. The leaf is then removed, decolourized with alcohol, and tested with iodine solution for starch grains.