Charles François du Fay Biography

Charles François du Fay

(Charles François de Cisternay du Fay; Paris, 1698-id., 1739) French physicist.He continued the investigations of Stephen Gray on the conduction of electricity and determined in 1733 the existence of two classes of electricity obtained by rubbing: resinous and vitreous, corresponding to what would later be called positive and negative electricity.He also distinguished between conductors and insulators and revealed the repulsion between electrically charged bodies of the same sign.He also conducted studies on crystalline optics.

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Joseph H. Maclagan Wedderburn Biography

Joseph H.Maclagan Wedderburn (Forfar, 1882-Princeton, 1948) British mathematician.Professor at Princeton University, he was editor of the Proceedings of the Edinburgh mathematical society (1905-1909) and the Annals of mathematics (1912-1928).He stated a theorem ( Wedderburn's theorem ) according to which every finite field is commutative.

Heinrich maier Biography

Heinrich Maier (Heidenheim, 1867-Berlin, 1933) German philosopher.He produced a "critical realism", along the lines of H.Driesch.He is the author, among other works, of Aristotle's syllogistics (1896-1900) and of The philosophy of reality (1926-1935).

Jose Mauri Biography

José Mauri (Valencia, 1856-Havana, 1937) Spanish composer.Installed in Cuba for most of his life, he founded the conservatory that bears his name there (1914).His work includes numerous songs and the opera The Slave (1921).

Joseph Reinach Biography

Joseph Reinach (Paris, 1856-1921) French journalist.He started in the journalistic profession through the Parisian newspaper La République Française , where from 1877 he began to publish interesting political analyzes that placed him at the epicenter of French public life in the last quarter of the century XIX.He acquired such importance in such a short space of time that in 1881, following the proclamation in France of the Third Republic, President León Gambetta called him to his side to place all his trust in him and appoint him head of his secretariat. At only thirty years old (1886), he became editor-in-chief of La République Française .Once this position was released, he directed a noisy journalistic campaign from the pages of the newspaper against the nationalist and populist politics of Georges Boulanger (the " General Revanche ").With this and other similar matters of maximum national interest, Joseph Reinach continued to rise in French public life and, in 188...

Joseph Bramah Biography

Joseph Bramah (Stainborough, 1749-London, 1814) British inventor.A mechanic by profession, he carried out numerous practical inventions: a security lock, a hydraulic press, the water-closet or toilet system, a printer to number banknotes, etc.

Jose Triadó Mayol Biography

José Triadó Mayol (Barcelona, 1870- id ., 1929) Spanish draftsman, former bookseller and painter.He collaborated with his drawings in the magazines El gato negro (1898), Album Salón (1898-1899) and Hispania (1899-1902).Outstanding author of ex libris, as a painter he made the triptych Las Cortes de Manresa for the Sant Jordi room of the Generalitat of Catalonia.

Joseph I Bonaparte Biography

José I Bonaparte (Ajaccio, France, 1768-Florence, 1844) King of Spain (1808-1812).Napoleon Bonaparte's older brother, he studied law and devoted himself to business.His brother appointed him King of Naples and, later, in 1808, of Spain, to which he immediately moved. José I Bonaparte When he arrived in Madrid, Spain was in revolt due to the mutiny of May 2, and he barely had time to settle down, as he had to leave hurriedly before the French defeat in Bailén.After the intervention of Napoleon himself, with the bulk of the French army, he was able to establish his government in the capital of the kingdom, but his liberal and enlightened measures met with popular hostility, which made him the victim of ridicule regarding his supposed alcoholism (he received the nickname by Pepe Botella ). After the battle of the Arapiles, and before the advance of the Duke of Wellington, he left Madrid taking a large amount of wealth, according to his detractors, and moved to Vitoria, where...

Hernan Cortes Biography

Hernán Cortés (Medellín, Badajoz, 1485-Castilleja de la Cuesta, Seville, 1547) Spanish conqueror of Mexico.Few times has history attributed the conquest of a vast territory to the determination and determination of one man; In this reduced list is Hernán Cortés, who always preferred to burn his ships to retreat.With little means, with little more support than his intelligence and his military and diplomatic intuition, he managed in just two years to reduce the splendid Aztec Empire to Spanish rule, populated, according to estimates, by some fifteen million inhabitants. Hernán Cortés It is true that various favorable circumstances accompanied him, and that, driven by ambition and the thirst for honors and riches, he committed abuses and violence, like other conquerors.But, of all of them, Cortés was the most cultured and capable captain, and although this does not serve as a mitigating factor, he was also impelled by a great religious fervor; his moral conscience came to ask him ...

Social classes in the Roman Empire: Patricios, Noble Commoners and Gentlemen Commoners

The Roman Empire has been one of the most powerful, extensive and important in the history of Humanity.Many peoples fell under the yoke of Rome, and today you can still admire the architectural remains of a civilization that reached a splendor almost absolute.However, in the Roman Empire there were great differences between the different strata that made up the society.Although from the oldest civilizations there were already different orders or "classes", today we focus on the different social classes in the Roman Empire: Patricios, Noble Commoners and Gentlemen Plebeians . Social classes in the Roman Empire The Roman civilization is one of the most complex societies of universal history.Given its long duration (since 8th century BC until the 5th century AD ) historians have divided the History of Rome into different historical periods: Monarchy, Republic of Empire .Today I propose you to enter the most splendid years of the Roman Empire ( sI and II BC .), ...

X-ray history

The X-rays were discovered in 1895 and from there they became a very revolutionary application in many branches of science, from astronomy to radiographs that we have not done so many times.the 120th anniversary of the X-rays knowing his inventor and the research that led him to such an important scientific advance. Article index Who invented the X-rays? The inventor or, rather, the person who discovered the X-rays was Wilhelm Conrad Rontgen , a German physicist who was focused on the field of electromagnetics Nothing else to present his discovery, Rontgen's theory received great attention from critics and public, and was translated into French, English or Russian. Although it is not a name as well known today as that of others you celebrate writers, the name of Wilhelm Conrad Rontgen is written in gold letters in the medical field, where he has had and has and numerous applications.The importance of his discovery was such in his day that he was the first Nobel Prize ...

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