Italian High Renaissance Painter and Inventor, 1452-1519 Italian High Renaissance Painter and Inventor, 1452-1519 Florentine Renaissance man, genius, artist in all media, architect, military engineer. Possibly the most brilliantly creative man in European history, he advertised himself, first of all, as a military engineer. In a famous letter dated about 1481 to Ludovico Sforza, of which a copy survives in the Codice Atlantico in Milan, Leonardo asks for employment in that capacity. He had plans for bridges, very light and strong, and plans for destroying those of the enemy. He knew how to cut off water to besieged fortifications, and how to construct bridges, mantlets, scaling ladders, and other instruments. He designed cannon, very convenient and easy of transport, designed to fire small stones, almost in the manner of hail??grape- or case-shot (see ammunition, artillery). He offered cannon of very beautiful and useful shapes, quite different from those in common use and, where it is not possible to employ cannon ?? catapults, mangonels and trabocchi and other engines of wonderful efficacy not in general use. And he said he made armoured cars, safe and unassailable, which will enter the serried ranks of the enemy with their artillery ?? and behind them the infantry will be able to follow quite unharmed, and without any opposition. He also offered to design ships which can resist the fire of all the heaviest cannon, and powder and smoke. The large number of surviving drawings and notes on military art show that Leonardo claims were not without foundation, although most date from after the Sforza letter. Most of the drawings, including giant crossbows (see bows), appear to be improvements on existing machines rather than new inventions. One exception is the drawing of a tank dating from 1485-8 now in the British Museum??a flattened cone, propelled from inside by crankshafts, firing guns. Another design in the British Museum, for a machine with scythes revolving in the horizontal plane, dismembering bodies as it goes, is gruesomely fanciful. Most of the other drawings are in the Codice Atlantico in Milan but some are in the Royal Libraries at Windsor and Turin, in Venice, or the Louvre and the École des Beaux Arts in Paris. Two ingenious machines for continuously firing arrows, machine-gun style, powered by a treadmill are shown in the Codice Atlantico. A number of other sketches of bridges, water pumps, and canals could be for military or civil purposes: dual use technology. Leonardo lived at a time when the first artillery fortifications were appearing and the Codice Atlantico contains sketches of ingenious fortifications combining bastions, round towers, and truncated cones. Models constructed from the drawings and photographed in Calvi works reveal forts which would have looked strikingly modern in the 19th century, and might even feature in science fiction films today. On 18 August 1502 Cesare Borgia appointed Leonardo as his Military Engineer General, although no known building by Leonardo exists. Leonardo was also fascinated by flight. Thirteen pages with drawings for man-powered aeroplanes survive and there is one design for a helicoidal helicopter. Leonardo later realized the inadequacy of the power a man could generate and turned his attention to aerofoils. Had his enormous abilities been concentrated on one thing, he might have invented the modern glider.   Related Paintings of LEONARDO da Vinci :. | Study fur the Sforza-Reiterstandbild | Anatomical studies of the basin of the Steibeins and the lower Gliedmaben of a woman and study of the rotation of the arms | Madonna with the carnation | The Virgin and Child with St Anne | Aurelio Luini attributed, profile of an old man |
Related Artists:
Domenico Tintoretto
Italian, 1560-1635,Son of Jacopo Tintoretto. He was taught by his father and assisted him in his workshop. At the age of 17 he was admitted to the Venetian painters' guild, and he is recorded in the confraternity of painters from 1594. He began his career by helping his father to execute the paintings in the Sala del Collegio and Sala del Senato in the Doge's Palace, Venice. Following this he worked independently at the palace, on the Sala dello Scrutinio and the Sala del Maggiore Consiglio. His training with his father helped him in his own compositions, several of which, such as the Battle of Salvore, or the Second Conquest of Constantinople, are heroic battle themes with complex groupings and dramatic poses. In the last two decades of the 16th century Domenico concentrated on religious commissions in Venice, including a Last Supper and Crucifixion (both c. 1583) for S Andrea della Zirada (both in situ), a Marriage of the Virgin for S Giorgio Maggiore (in situ) and a Crucifixion for the Scuola dei Mercanti.
renoir
född 25 februari 1841 i Limoges, Haute-Vienne, Frankrike, död 3 december 1919 i Cagnes-sur-Mer
Wilhelm Krause
Wilhelm Krause (July 12, 1833 - February 4, 1910) was a German anatomist born in Hanover. In 1854 he earned his medical doctorate, and later (1860) became an associate professor at the University of Göttingen. In 1892 he was appointed head of the Anatomical Institute Laboratory in Berlin. He was the son of anatomist Karl Friedrich Theodor Krause (1797-1868). Krause is remembered for the discovery and description of mechanoreceptors that were to become known as Krause's corpuscles, sometimes called "Krause's end-bulbs". His name is also associated with "Krause's membranes", which are isotropic bands in striated muscle fiber that consist of disks of sarcoplasm and connect the individual fibrils. In addition he performed pioneer research in the field of embryology. One of his well-known students at Göttingen was bacteriologist Robert Koch (1843-1910).