Biography of jacques cesar alexander charles

French inventor, scientist and mathematician (–)

Jacques Alexandre César Charles (12 November – 7 April ) was a Frenchinventor, scientist, mathematician, and balloonist.

Charles wrote almost nothing about mathematics, and most of what has been credited to him was due to mistaking him with another Jacques Charles (sometimes called Charles the Geometer^[1]), also a member of the Paris Academy of Sciences, entering on 12 May

Charles and the Robert brothers launched the world's first hydrogen-filled gas balloon August 27, ; then December 1, , Charles and his co-pilot Nicolas-Louis Robert ascended to a height of about 1, feet ( m) in a piloted gas balloon.

Their pioneering use of hydrogen for lift led to this type of gas balloon being named a Charlière (as opposed to the hot-airMontgolfière).

Charles's law, describing how gases tend to expand when heated, was formulated by Joseph Louis Gay-Lussac in , but he credited it to unpublished work by Charles.