Jacques Charles
Who was Jacques Charles?
French inventor, scientist, mathematician, and balloonist
Biographical data adapted from Wikipedia’s article on Jacques Charles (CC BY-SA 4.0).
Biography
Jacques Alexandre César Charles (12 November 1746 – 7 April 1823) was a French inventor, scientist, and balloonist from Beaugency, France. He is best known for his influential work on gas-filled balloons and the gas law named after him, although that attribution is somewhat complex. Charles spent much of his life in Paris, where he died on 7 April 1823, and was married to Julie Charles.
Charles became known on 27 August 1783, when he and the Robert brothers launched the first hydrogen-filled gas balloon. This unmanned flight showed the practical use of hydrogen as a lifting gas and paved the way for human flight. Less than four months later, on 1 December 1783, Charles and his co-pilot Nicolas-Louis Robert reached about 1,800 feet (550 meters) in a piloted gas balloon, making them some of the earliest people to achieve sustained flight. The hydrogen-filled gas balloon they developed was called the Charlière, different from the hot-air Montgolfière created by the Montgolfier brothers.
Charles was elected to the Académie des Sciences in 1795, showing his high status in the French scientific community. He later became a professor of physics there, where he continued to work on scientific education and research. His work included both practical inventions and theoretical insights, making him a key figure in late eighteenth-century French science.
Charles's law, which says gases tend to expand when heated, is named after him, though this deserves clarification. Joseph Louis Gay-Lussac formally explained and published the law in 1802 and specifically credited it to Charles's earlier unpublished experiments. Since Charles didn't leave any written records of this work, the credit relies solely on Gay-Lussac's acknowledgment.
There is ongoing confusion in historical records about Charles and mathematics. He wrote almost nothing on mathematical topics, and much of the mathematical work attributed to him has been found to belong to another Jacques Charles, sometimes called Charles the Geometer. This second Jacques Charles was also a member of the Paris Academy of Sciences, having joined on 12 May 1785, and the two have often been mixed up by later historians and encyclopedists.
Before Fame
Jacques Alexandre César Charles was born on November 12, 1746, in Beaugency, a small town on the Loire River in north-central France. Not much detailed information is available about his early education or the specifics of his youth, but he grew up during the French Enlightenment, a time when natural philosophy and experimental science were highly valued across Europe. Scientific salons and academies in Paris gave aspiring thinkers pathways to recognition, and Charles took advantage of this, joining the capital's scientific community.
By the early 1780s, Charles was well established within Paris's scientific society and ready to take on ambitious experiments. The quest for human flight, inspired by the Montgolfier brothers' success with hot-air balloons, sparked his most famous work. Charles saw the potential of hydrogen's superior lifting properties and teamed up with the skilled instrument-makers Anne-Jean and Nicolas-Louis Robert to build and launch a working hydrogen balloon, a project that would make him famous.
Key Achievements
- Co-launched the world's first hydrogen-filled gas balloon on 27 August 1783
- Completed one of the earliest crewed gas balloon flights, ascending to approximately 550 metres on 1 December 1783
- Pioneered the Charlière hydrogen balloon design, which became the dominant model for gas balloon aviation
- Elected to the Académie des Sciences in 1795 and appointed professor of physics there
- Conducted the unpublished gas expansion experiments that Gay-Lussac later formalized and published as Charles's law in 1802
Did You Know?
- 01.After the piloted balloon flight on 1 December 1783, Charles ascended alone for a second, solo flight that same day, reaching an estimated altitude of 3,000 metres — but he never flew in a balloon again for the rest of his life.
- 02.The hydrogen balloon design Charles developed with the Robert brothers introduced several technical innovations still associated with balloon flight, including the use of a valve at the top of the envelope to release gas and a net to distribute the load of the gondola.
- 03.Charles's law was never published by Charles himself; its attribution rests entirely on a footnote by Gay-Lussac in his 1802 paper, making it one of the more unusual cases of a major scientific law being named for someone who left no written record of the discovery.
- 04.The first unmanned hydrogen balloon Charles launched on 27 August 1783 travelled roughly 21 kilometres before landing in the village of Gonesse, where frightened local peasants reportedly attacked and destroyed it with pitchforks.
- 05.Charles has been confused in historical sources with a separate scientist known as Charles the Geometer, also a member of the Paris Academy of Sciences, leading to erroneous mathematical achievements being credited to the balloonist for many years.