Davy, Edmund

Acetylene was discovered m 1836 by Edmund Davy and characterized by the French chemist P E M Berthelot m 1862 It did not command much attention until its large scale preparation from calcium carbide m the last decade of the nineteenth century stim ulated interest m industrial applications In the first stage of that synthesis limestone and coke a material rich m elemental carbon obtained from coal are heated m an electric furnace to form calcium carbide... 

On February 21, 1809, Hatchett became a member of the famous Literary Club which had been founded in 1764 by Dr. Samuel Johnson and Sir Joshua Reynolds (51). As treasurer of the club, Hatchett prepared a brief historical account of it, which appears in Boswell s Life of Johnson (25). The club also included, among others, Edmund Burke, Oliver Goldsmith, David Garrick, Edward Gibbon, Adam Smith, Sir Joseph Banks, Sir Charles Blagden, Sir Humphry Davy, Dr. W. H. Wollaston, Sir Walter Scott, Sir Thomas Lawrence, and Dr. Thomas Young. 

Acetylene was discovered by the British chemist Edmund Davy (1785-1857) in 1836. Davy obtained the gas accidentally when he combined water with potassium carbide (KCH2) while attempting to make potassium metal. He noted that the gas burned with a bright flame and thought it might he used as a source of illumination. That application was impractical, however, because of the high cost of potassium carbide. When the German chemist Frederich Wohler (1800-1882) discovered the far less expensive calcium carbide... 

British chemist Edmund Davy discovers acetylene. 

For more jubilant dancing, see Edmund Davy s description of brother Humphry s discovery of potassium metal earlier in this book (p. 404). 

Eva Edmund Davis A. B. Rolf H. D. Roof R. T. Dennis H. H. Dennin Virginia L. Brazzell Mary A. Eleazor Spartanburg Chamber of Commerce... 

His cousin, Edmund Davy, continued the work and in 1820 he discovered that the platinum could be introduced at room temperature provided that it was finely divided. Dobereiner continued this... 

Priestley discovered oxygen in 1774. Edmund Davy produced acetylene in 1800. Linde devised a method for extracting oxygen from liquid air in 1893. Fouche and Picard invented oxyacetylene welding torch in 1903, which could achieve a flame temperarnre of 3250 °C. Since then, gas welding became an economical method for fusion welding of the metals as well as for cutting. 

Studied by David Davies s group at the National Institutes of Health at a resolution of 2 A (Segal et a/., 1974). A third myeloma protein has been studied extensively at the Argonne National Laboratories by Edmund-son, Schiffer, and their collaborators. This is a light-chain dimer associated with the McG human myeloma protein (Schiffer et aL, 1973 Edmundson et aL, 1974). In addition, a group of researchers from Munich and the Argonne National Laboratories have compared the structure at 2 A resolution of two k L-chain dimers, Au and Rei, which differ in structure by only 16 amino acid residues (Fehlhammer et aL, 1975 Epp et aL, 1975). 

Davy went on to use his battery to attack caustic potash and soda, two materials that had defied analysis. Edmund Davy, his cousin and assistant at the time, said ... 

Edmund Davy, who was then his assistant, said (J. Davy, (i), i, 384 XI, i, 109) that when Humphry Davy saw the minute globules of potassium burst through the crust of potash, and take fire as they entered the atmosphere, he could not contain his joy — he actually bounded about the room in ecstatic delight and some little time was required for him to compose himself sufficiently to continue the experiment . An entry in Davy s notebook dated 19 October concludes Capital Experiment proving the decompn of Potash Facsim. in Paris, ii, frontis. ih.y i, 277. In the published paper the metal is called potasium . 

Edmund William Davy (Penzance, 1785-Dublin, 5 November 1857), cousin of Humphry, was assistant at the Royal Institution (1804-12), professor of chemistry at the Royal Cork Institution (1813-26), and then until his death Higgins s successor in the Royal Dublin Society. He discovered... 

Acetylene was obtained by Edmund Davy by the action of water on the residue from the preparation of potassium by heating potassium carbonate and carbon (see p. 95), and Gmelin from a product of the same process obtained croconic acid, later recognised as a derivative of benzene (see p. 794). These were also synthetic products. 

Acetylene (Edmund Davy) Davy creates acetylene by heating potassium carbonate to high temperatures and letting it react to water. 

The first reference to carbide and acetylene came from the Irish chemist Edmund Davy in England in 1836. When trying to produce metal potassium by heating a mixture of calcined potassium tartrate with charcoal, he obtained a black mass as by-product - i.e. calcium carbide - which reacted with water and formed a combustible gas. In a scientific report he described the characteristic properties of acetylene in detail. At that time, he called the gas bicarburet of hydrogerf, which means more or less double carbon bond of hydrogen . 

Acetylene had been discovered in 1836 by Edmund Davy, but its use was not practical in welding until about 1900, when a suitable blowtorch was developed. At first, oxyacetylene welding was one of the more popular welding methods due to its portability and relatively low cost. As the twentieth century progressed, however, it was largely replaced with arc welding, as metal coverings (known as flux) for the electrode that stabilize the arc and shield the base material from impurities continued to be developed. 

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