He was taught the theory of purification of matter 282 years ago today, on August 26, 1743 (July 8, 1743), the founder of modern chemistry mainly advanced Lavazzi. Lavazzi, a French chemist, 26 August 1743, was born in Paris. His father was a lawyer. Lavazzi from childhood, under the guidance of a family teacher, studied astronomy, mathematics, chemistry, botany, mineralogy and geology, etc. Because his main achievements were frequently close to a famous chemist at the time, and therefore he was also interested in chemistry. At the age of 23, he was awarded the French Academy of Sciences Gold Award for his paper on urban lighting issues, and he was selected as one of the experts in the Academy of Sciences. In 1768 he was selected as the