Quantitative chemistry

Lavoisier boiled water for 101 days, observing that sediment appeared and the water did not change its weight, refuting the Greek theory that water could be converted into earth. His precise, quantitative method provided clearer understanding and marked a significant advance in the field of chemistry.
 Antoine-Laurent Lavoisier France 1769 Quantitative chemistry

Lavoisier boiled water for 101 days, observing that sediment appeared and the water did not change its weight, refuting the Greek theory that water could be converted into earth. His precise, quantitative method provided clearer understanding and marked a significant advance in the field of chemistry.