then lavoisier learned to produce pure hydrogen for filling balloons to synthesize water.s the first to develop a scientific system of chemical compounds, but in order to maintain his laboratory he became a royal tax farmer, that is, he received the right to collect taxes. the people hated them even after the great war. during the french revolution, the scientist was arrested, according to one version from the submission of the famous jean paul marat, who believed in magnetism and mesmerism. this is a false doctrine, and lavoisier refuted them. he was accused of conspiring with the enemy. france was told that the republic does not need chemists. today the name is lavoisier included in the list of the greatest scientists of france, engraved on the ephel tower. today marks the 120th anniversary of the birth of vladimir kakinaki, an iconic figure in the history of our aviation. he was born in novorossiysk, had a difficult childhood, but eventually became one of the most famous test pilots of his time. in 1935, on an i-15 fighter , kakinaki climbed more than 14.5 km, setting a