The Belgian philosopher sought experimental confirmation of this idea, most famously by planting a five-pounds willow sapling into two hundred pounds of soil, and watering it for five years. At the end of that time, the tree weighted 164 pounds but the soil han lost scarcely any weight; therefore van Helmont concluded, the entire composition of the tree must have been produced from water alone. According to van Helmont,semina(seeds) implanted in the world at creation have the power to transform water into all substances.

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