Musschenbroek's experiment, the discovery of the transpiration of plants. By covering a plant with a bell glass cemented to a plate of lead which covered its root he discovered that every morning the leaves were covered in dew as was the inside of the jar, this was due to the process of water movement through the plant and its evaporation from leaves, stems and flowers. Pieter van Musschenbroek, 1692 – 1761. Dutch scientist. From The Universe or, The Infinitely Great and the Infinitely Little, published 1882.

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