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Georg Ernst Stahl and the Phlogiston Theory

Georg Ernst Stahl and the Phlogiston Theory

Tabea Tietz
On October 22, 1659, German chemist, physician and philosopher Georg Ernst Stahl was born. Stahl developed the phlogiston theory of combustion and of such related biological processes as respiration, fermentation, and decay. Combustible objects, he said, were rich in phlogiston, and during combustion is lost. The remaining ash, now having no phlogiston, could no longer burn. Until the late 18th century his works on phlogiston were accepted as an explanation for chemical…
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chemistry
Antoine Lavoisier’s Theory of Combustion

Antoine Lavoisier’s Theory of Combustion

Harald Sack
On Nov 1, 1772, French chemist Antoine Lavoisier [1] reported in a note to the Secretary of the French Academy of Sciences about the role of “air” in the combustion process. It required five more years of experiments, before in 1777, Lavoisier was ready to propose a new theory of combustion that excluded phlogiston,[4] which according to the prevailing theories of the time was part of every matter and responsible for the combustion process.…
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engineering
Ètienne Lenoir and the Internal Combustion Engine

Ètienne Lenoir and the Internal Combustion Engine

Tabea Tietz
On January 24, 1860, Belgian engineer Étienne Lenoir was granted a patent on his newly developed internal combustion engine. Lenoir’s engine design was the first commercially successful internal combustion engine. Étienne Lenoir – Early Years Étienne Lenoir was born as the third of eight children in the 800-strong community of Mussy-la-Ville near Virton, Belgium, the son of Jean-Louis Lenoir, a “merchant”, and Margot Magdelaine, his wife. He seems to have chosen a technical…
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