Lucien Paul Victor Febvre (, French: [lysjɛ̃ pɔl viktɔʁ fɛvʁ]; 22 July 1878 – 11 September 1956) was a French historian best known for the role he played in establishing the Annales School of history. He was the initial editor of the Encyclopédie française together with Anatole de Monzie.
Ernest Benjamin Esclangon (17 March 1876 – 28 January 1954) was a French astronomer and mathematician.
Born in Mison, Alpes-de-Haute-Provence, in 1895 he started to study mathematics at the École Normale Supérieure, graduating in 1898. Looking for some means of financial support while he completed his doctorate on quasi-periodic functions, he took a post at the Bordeaux Observatory, teaching some mathematics at the university.
During World War I, he worked on ballistics and developed a novel method for precisely locating enemy artillery. When a gun is fired, it initiates a spherical shock wave but the projectile also generates a conical wave. By using the sound of distant guns to compare the two waves, Escaglon was able to make accurate predictions of gun locations.
After the armistice in 1919, Esclangon became director of the Strasbourg Observatory and professor of astronomy at the university the following year. In 1929, he was appointed director of the Paris Observatory and of the International Time Bureau, and elected to the Bureau des Longitudes in 1932. He is perhaps best remembered for initiating in 1933 the first speaking clock service, reportedly to relieve the observatory staff from the numerous telephone calls requesting the exact time. He was elected to the Académie des Sciences in 1939.
Esclangon was the President of the Société astronomique de France (SAF), the French astronomical society, from 1933–1935. In 1935, he received the Prix Jules Janssen, the society's highest award.
Serving as director of the Paris Observatory throughout World War II and the German occupation of Paris, he retired in 1944. He died in Eyrenville, France.
The binary asteroid 1509 Esclangona is named after him.
The lunar crater Esclangon is named after him.
His doctoral students include Daniel Barbier, Édmée Chandon, Louis Couffignal, André-Louis Danjon, and Nicolas Stoyko.
Friedrich Meinecke (October 20, 1862 – February 6, 1954) was a German historian, with national liberal and antisemitic views, who supported the Nazi invasion of Poland. After World War II, as a representative of an older tradition, he criticized the Nazi regime, but continued to express antisemitic prejudices.In 1948, he helped to found the Free University of Berlin in West Berlin, and remained an important figure to the end of his life.
Hans Vaihinger (German: [hans ˈfaɪɪŋɐ]; September 25, 1852 – December 18, 1933) was a German philosopher, best known as a Kant scholar and for his Die Philosophie des Als Ob (The Philosophy of 'As if'), published in 1911 although its statement of basic principles had been written more than thirty years earlier.