Van Helmont's willow tree experiment(1648) 1.Weight of dry soil 200Ib(91kg) 2.Initial weight of the 5 Ib (2.3kg) tree.(fresh weight) 3.Final weight of the 169Ib76.8kg tree.(fresh weight) 4.Weight gain of the 164b(74.5kg) tree.(fresh weight) 5.Weight gain of the tree 16b(7.45kg) (dry weight) 6.Weight loss of the soil 2oz(57g) (dry weight) 7.Percent loss from soil 0.06% (dry weight)Van Helmont's willow tree experiment (1648) 1. Weight of dry soil 200 lb (91kg) 2. Initial weight of the tree.(fresh weight) 5 lb (2.3kg) 3. Final weight of the tree.(fresh weight) 169 lb (76.8kg) 4. Weight gain of the tree.(fresh weight) 164 lb (74.5kg) 5. Weight gain of the tree (dry weight) 16 lb (7.45kg) 6. Weight loss of the soil (dry weight) 2 oz (57g) 7. Percent loss from soil (dry weight) 0.06%