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Swiss Inventors: Martin Schadt, René Thury, Jacques Piccard, George de Mestral, Nicolas Fatio de Duillier, Yves Rossy, Wilhelm His, Sr.
by:General Books LLC
Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Martin Schadt, René Thury, Jacques Piccard, George de Mestral, Nicolas Fatio de Duillier, Yves Rossy, Wilhelm His, Sr., Aimé Argand, Niklaus Riggenbach, Jean Samuel...
Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Martin Schadt, René Thury, Jacques Piccard, George de Mestral, Nicolas Fatio de Duillier, Yves Rossy, Wilhelm His, Sr., Aimé Argand, Niklaus Riggenbach, Jean Samuel Pauly, Heinrich Wild, Carl Roman Abt, Hans Renold, Franois Isaac de Rivaz, Heinrich Von Wild, Johann Georg Bodmer, Fritz Gegauf, René Sommer, Hermann Steiner. Excerpt: Franois Pierre Ami Argand Aimé Argand (5 July 1750 14 October 1803) was Swiss physicist and chemist . He greatly improved the oil lamp . Francois-Pierre-Ami Argand was born in Geneva , Switzerland, the ninth of ten children. His father was a watchmaker, who intended for him to enter the clergy. However, he had an aptitude more for science, and became a pupil of the noted botanist and meteorologist Horace-Bénédict de Saussure . He published several scientific papers on meteorological subjects while in Paris in his late twenties. He took a teaching post in chemistry and developed some ideas for improving the distillation of wine into brandy, and, with his brother, successfully built a large distillery. During this period, in 1780, he started to invent improvements on the conventional oil lamp. The basic idea was to have a cylindrical wick which air could flow through and around, increasing the intensity of the light produced. A cylindrical chimney enhanced the air flow and a series of experiments gave the proportions for optimum operation. A mechanism for raising and lowering the wick allowed some adjustment and optimization as well. Experimenting with oils, he found that purified spermaceti oil was optimal, though a good grade of olive oil could serve as well. The light was much brighter than a candle (by a factor of five to ten), burned cleanly, and was cheaper than using candles. In 1783 Argand met Etienne Montgolfier and became closely involved wi...
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