Antoine Deparcieux
An 18th-century mathematical mind who turned the study of mortality into a science, calculating the lifespan of annuities and fountains alike.
1703–1768 (age 65)·French mathematician·Birthday: October 28
Biography
Born into a farming family in Languedoc, Antoine Deparcieux's intellectual hunger was too great for rural life. He taught himself before making his way to Lyon and finally Paris, supporting himself by crafting precision sundials. His practical mind found its greatest subject in demography. In 1746, he published a seminal work on life expectancy, using mortality data to calculate the values of life annuities and tontines—a foundational text for actuarial science. Beyond human lifespans, his engineering prowess was sought by the aristocracy; he designed the intricate waterworks for the famed fountains at the Château de La Font des Jardins. Deparcieux embodied the Enlightenment ideal, applying mathematics to both human finance and mechanical art.
#1 When Antoine Was Born
The biggest hits of 1703
Antoine's Life & Times
The world at every milestone
1703Born
1708Started school
1716Became a teenager
1719Could drive
1721Could vote
1724Turned 21
1733Turned 30
1743Turned 40
1753Turned 50
1763Turned 60
1768Died at 65
Key Achievements
- Published the influential 'Essai sur les probabilités de la durée de la vie humaine' (1746), pioneering actuarial science.
- Designed and built the sophisticated hydraulic system for the fountains at the Château de La Font des Jardins.
- Elected to the French Academy of Sciences in 1746 for his contributions to mathematics and practical mechanics.
- Supported himself as a young scholar in Paris by manufacturing highly accurate sundials.
Did You Know?
The crater Deparcieux on the Moon is named in his honor.
He was originally destined to take over his family's farm before pursuing his studies.
His work on life tables was used to evaluate financial products for French state lotteries and pensions.
“A sundial's precision is found in the shadow of a single, unwavering gnomon.”
