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1776 In Science
The year 1776 in science and technology involved some significant events. Astronomy * Lagrange publishes a paper on the stability of planetary orbits. Botany * William Withering publishes ''The Botanical Arrangement of all the Vegetables Naturally Growing in Great Britain'', the first flora in English based on Linnaean taxonomy. Chemistry * James Keir begins publication of ''A Dictionary of Chemistry'' in London, a translation into English of Pierre Macquer's ''Dictionnaire de chymie'' (1766). Exploration * July 12 – Captain James Cook sets off from Plymouth, England, in HMS ''Resolution'' on his third voyage, to the Pacific Ocean and Arctic. Geology * James Keir suggests that some rocks, such as those at the Giant's Causeway, might have been formed by the crystallisation of molten lava. Mathematics * Jean Baptiste Meusnier discovers the helicoid and announces Meusnier's theorem. Medicine * November 30 – Sir John Pringle presents "A discourse upon some late improvem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science
Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for scientific reasoning is tens of thousands of years old. The earliest written records in the history of science come from Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE. Their contributions to mathematics, astronomy, and medicine entered and shaped Greek natural philosophy of classical antiquity, whereby formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but was preserved in the Muslim world during the Islamic Golden Age and later by the efforts of Byzantine Greek scholars who brought Greek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystallisation
Crystallization is the process by which solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas. Attributes of the resulting crystal depend largely on factors such as temperature, air pressure, and in the case of liquid crystals, time of fluid evaporation. Crystallization occurs in two major steps. The first is nucleation, the appearance of a crystalline phase from either a supercooled liquid or a supersaturated solvent. The second step is known as crystal growth, which is the increase in the size of particles and leads to a crystal state. An important feature of this step is that loose particles form layers at the crystal's surface and lodge themselves into open inconsistencies such as pores, cracks, etc. The majority of minerals and organic molecules crystallize easily, and the resulting crystals are gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmipède
The Palmipède (from French, meaning web-toed) was an early steamboat created in 1774 by French nobleman, engineer and inventor Marquis Claude de Jouffroy. It was tested in June and July 1776 on the Doubs river between Besançon and Montbéliard and thus became the first steam-powered vessel. The boat was driven by a Newcomen steam engine and was the predecessor of the Pyroscaphe, also made by Jouffroy. It had a length of 13 m (42 ft). The steamboat was not considered a success due to its lower than desired speed, which led to the development of the first paddle steamer A paddle steamer is a steamship or steamboat powered by a steam engine that drives paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, where the first uses wer ....Dalton, Anthony. "Introduction." Fire Canoes: Steamboats on Great Canadian Rivers. Victoria [B.C.: Heritage House, 2012. 144. Print. p. 18 Specifications The Palmip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steamboat
A steamboat is a boat that is marine propulsion, propelled primarily by marine steam engine, steam power, typically driving propellers or Paddle steamer, paddlewheels. Steamboats sometimes use the ship prefix, prefix designation SS, S.S. or S/S (for 'Screw Steamer') or PS (for 'Paddle Steamer'); however, these designations are most often used for steamships. The term ''steamboat'' is used to refer to smaller, insular, steam-powered boats working on lakes and rivers, particularly riverboats. As using steam became more reliable, steam power became applied to larger, ocean-going vessels. Background Limitations of the Newcomen steam engine Early steamboat designs used Newcomen atmospheric engine, Newcomen steam engines. These engines were large, heavy, and produced little power, which resulted in an unfavorable power-to-weight ratio. The Newcomen engine also produced a reciprocating or rocking motion because it was designed for pumping. The piston stroke was caused by a water jet i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claude-François-Dorothée, Marquis De Jouffroy D'Abbans
Claude-François-Dorothée, marquis de Jouffroy d'Abbans (30 September 1751 - 18 July 1832) was a French naval architect and engineer. He was the inventor of the first steamboat, leading to the first industrial revolution by launching a new dynamic on the waters of the globe. In 1773, Jouffroy d'Abbans met with the Perier brothers and studied in their workshop the ' (Fire pump), which had been used as a motive force for the hydraulic machine developed by Chaillot, in order to apply it to ship propulsion. In 1776, Jouffroy d'Abbans developed a 13-meter steamship, the '' Palmipède'', in which the engine moved oars equipped with rotating blades. The ship sailed on the Doubs in June and July 1776. In 1783, he made a paddle steamer named the ''Pyroscaphe'' ply on the Saône. However, the Académie des Sciences prohibited him from using his invention in Paris, and instead nominated Périer, one of de Jouffroy d'Abbans' opponents whose previous attempts had failed, to inspect the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Lépecq De La Clôture
Louis Lépecq de La Clôture (12 July 1736 – 5 November 1804) was a French surgeon and epidemiologist. His work consisted mainly of a 15-year observation of the relations between climate, geography and pathologies in Normandy. Biography Son of Louis Lépecq de La Clôture (1706–1742), doctor-regent and professor of surgery at the Faculty of Medicine in Caen and Madeleine Pyron, he was born in Caen in Calvados. He began his medical studies in Caen where, in 1755, he obtained his medical degree. After a stay in Paris where he worked at the Hôpital de la Charité, notably under the direction of Théophile de Bordeu who taught him to "replace words with facts" he returned to Caen (1763) as an '' agrégé'' at the Faculty and Professor of Surgery. In 1769, he went to Rouen, where he was agrégé at the College of Physicians then appointed doctor of the Hôtel-Dieu de Rouen, then doctor of the Prisons and doctor of the ''Généralité'' for epidemic diseases. He married Marie C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Normandy
Normandy (; french: link=no, Normandie ; nrf, Normaundie, Nouormandie ; from Old French , plural of ''Normant'', originally from the word for "northman" in several Scandinavian languages) is a geographical and cultural region in Northwestern Europe, roughly coextensive with the historical Duchy of Normandy. Normandy comprises mainland Normandy (a part of France) and the Channel Islands (mostly the British Crown Dependencies). It covers . Its population is 3,499,280. The inhabitants of Normandy are known as Normans, and the region is the historic homeland of the Norman language. Large settlements include Rouen, Caen, Le Havre and Cherbourg. The cultural region of Normandy is roughly similar to the historical Duchy of Normandy, which includes small areas now part of the departments of Mayenne and Sarthe. The Channel Islands (French: ''Îles Anglo-Normandes'') are also historically part of Normandy; they cover and comprise two bailiwicks: Guernsey and Jersey, which are B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scurvy
Scurvy is a disease resulting from a lack of vitamin C (ascorbic acid). Early symptoms of deficiency include weakness, feeling tired and sore arms and legs. Without treatment, decreased red blood cells, gum disease, changes to hair, and bleeding from the skin may occur. As scurvy worsens there can be poor wound healing, personality changes, and finally death from infection or bleeding. It takes at least a month of little to no vitamin C in the diet before symptoms occur. In modern times, scurvy occurs most commonly in people with mental disorders, unusual eating habits, alcoholism, and older people who live alone. Other risk factors include intestinal malabsorption and dialysis. While many animals produce their own vitamin C, humans and a few others do not. Vitamin C is required to make the building blocks for collagen. Diagnosis is typically based on physical signs, X-rays, and improvement after treatment. Treatment is with vitamin C supplements taken by mouth. Improvemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society
The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, recognising excellence in science, supporting outstanding science, providing scientific advice for policy, education and public engagement and fostering international and global co-operation. Founded on 28 November 1660, it was granted a royal charter by King Charles II as The Royal Society and is the oldest continuously existing scientific academy in the world. The society is governed by its Council, which is chaired by the Society's President, according to a set of statutes and standing orders. The members of Council and the President are elected from and by its Fellows, the basic members of the society, who are themselves elected by existing Fellows. , there are about 1,700 fellows, allowed to use the postnominal title FRS (Fellow of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Pringle (physician)
Sir John Pringle, 1st Baronet (10 April 1707 – 18 January 1782) was a Scottish physician who has been called the "father of military medicine" (although Ambroise Paré and Jonathan Letterman have also been accorded this sobriquet). Biography Youth and early career John Pringle was the youngest son of Sir John Pringle, 2nd Baronet, of Stichill, Roxburghshire (1662–1721), by his spouse Magdalen (d. December 1739), daughter of Sir Gilbert Eliott, 3rd Baronet, of Stobs. He was educated at St Andrews, at Edinburgh, and at Leiden. In 1730 he graduated with a degree of Doctor of Physic at the last-named university, where he was an intimate friend of Gerard van Swieten and Albrecht von Haller. He settled in Edinburgh at first as a physician, but between 1733 and 1744 was also Professor of Moral Philosophy at Edinburgh University. In 1742 he became physician to the Earl of Stair, then commanding the British army in Flanders. About the time of the battle of Dettingen in Bavari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meusnier's Theorem
In differential geometry, Meusnier's theorem states that all curves on a surface passing through a given point ''p'' and having the same tangent line at ''p'' also have the same normal curvature at ''p'' and their osculating circles form a sphere. The theorem was first announced by Jean Baptiste Meusnier in 1776, but not published until 1785. At least prior to 1912, several writers in English were in the habit of calling the result ''Meunier's theorem'', although there is no evidence that Meusnier himself ever spelt his name in this way.R. C. ArchibaldQuery 76 ''Mathematical Gazette'', 6 (May, 1912), p. 297 This alternative spelling of Meusnier's name also appears on the Arc de Triomphe in Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S .... References Further referencesMeusni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
