France

Jean-Rondolphe Perronet and the Bridges of Paris

Jean-Rondolphe Perronet and the Bridges of Paris

Jean-Rodolphe Perronet (1708-1794) On October 27, 1708, French architect and structural engineer Jean-Rodolphe Perronet was born. He is best known for his many stone arch bridges, among them his most popular work, the Paris Pont de la Concorde. Jean-Rodolphe Perronet was born in Suresnes, a suburb of Paris, the son of a Swiss Guardsman. At 17 he entered the architectural practice of Jean Beausire, “first architect” to the city of Paris, as…
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The Unfortunate Inventions of Charles Cros

The Unfortunate Inventions of Charles Cros

Charles Cros (1842-1888) On October 1, 1842, French poet and inventor Charles Cros was born. He developed various improved methods of photography including an early color photo process. He also invented improvements in telegraph and paleophone technology. But lacking financial resources, he was unable to patent his devices before Thomas Edison and others developed the idea and started production. Émile-Hortensius-Charles Cros was born in Fabrezan, Aude, France, 35km to the East of Carcassonne.…
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Joseph Proust and the Law of Constant Composition

Joseph Proust and the Law of Constant Composition

Joseph Proust (1754-1826) On September 26, 1754, French chemist Joseph Louis Proust was born. He was best known for his discovery of the law of constant composition in 1799, stating that in chemical reactions matter is neither created nor destroyed. Joseph L. Proust was born on September 26, 1754 in Angers, France as the second son of Joseph Proust, an apothecary, and Rosalie Sartre. Joseph studied chemistry in his father’s shop and later came to…
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Legendre’s Elements of Geometry

Legendre’s Elements of Geometry

1820 watercolor portrait of French mathematicians Adrien-Marie Legendre and Joseph Fourier On September 18, 1752, French mathematician Adrien-Marie Legendre was born. He is best known for his contributions in number theory, celestial mechanics and elliptic functions. It was in a paper on celestial mechanics concerning the motion of planets (1784) that he first introduced the Legendre Polynomials. Moreover, he served as director of the of the Bureau des Longitudes, standardizing French weights…
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Jacques de Perthes and European Archaeology

Jacques de Perthes and European Archaeology

Jacques de Perthes (1788 – 1868) On September 10, 1788, French archeologist Jacques Boucher de Crèvecœur de Perthes was born. He was the first to establish that Europe had been populated by early man. Further, his discovery of whole handaxes, tools and fragments embedded in and scattered about the fossilized bones of prehistoric mammals in the high banks of the Somme River showed that man existed at least as early as the…
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Antoine Cournot and the Mathematical Theory of Economics

Antoine Cournot and the Mathematical Theory of Economics

On August 28, 1801, French philosopher and mathematician Antoine-Augustin Cournot was born. He is considered being the first economist who applied mathematics to the treatment of economic questions. In 1838, he published Recherches sur les principes mathématiques de la théorie des richesses (Researches into the Mathematical Principles of the Theory of Wealth) which was a treatment of mathematical economics. “So far we have studies how, for each commodity by itself, the law…
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Pierre Mechain and the Meridian Survey Expedition

Pierre Mechain and the Meridian Survey Expedition

On August 16, 1744, French astronomer and surveyor Pierre François André Méchain was born. Together with Charles Messier, was a major contributor to the early study of deep sky objects and comets. He participated in the Meridian survey expedition in 1792 that produced measurements, which have served as the fundament of the metric system. Pierre Méchain was born in Laon, a medieval town in the Picardy region of northern France, as the son…
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Nicolas-Jacques Conté and the Pencil

Nicolas-Jacques Conté and the Pencil

Nicolas-Jacques Conté (1755-1805) On August 4, 1755, French painter, inventor, army officer and balloonist, Nicolas-Jacques Conté was born. Among others, he is credited with the invention of the modern pencil. Moreover, some consider him one of the greatest inventive minds of the eighteenth century. He distinguished himself for his mechanical genius which was of great avail to the French army in Egypt. Napoleon Bonaparte called him “a universal man with taste, understanding…
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Jean Picard and his Love for Accuracy

Jean Picard and his Love for Accuracy

Jean-Félix Picard (1620 – 1682) On July 21, 1620, French astronomer, cartographer and hydraulic engineer Jean-Félix Picard was born. He is regarded as the founder of modern astronomy in France. He introduced new methods, improved the old instruments, and added new devices, such as Huygens‘ pendulum clock to record times and time intervals. Jean-Félix Picard was born as a son of a bookseller and was allowed to study at the Jesuit Collège Royal…
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The Dancers of Edgar Degas

The Dancers of Edgar Degas

Ballet Class (1873) by Edgar Degas On July 19, 1834, French artist Edgar Degas was born, famous for his paintings, sculptures, prints, and drawings. He is especially identified with the subject of dance; more than half of his works depict dancers. He is regarded as one of the founders of Impressionism, although he rejected the term, and preferred to be called a realist. Edgar Degas graduated from school in 1853 and turned…
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