[28] His process involved the deposition of a thin layer of metallic silver onto glass through the chemical reduction of silver nitrate. Learn more about the benefits of being The best mirrors, though, are still made of silvered glass, and if we take proper care, that mirror on the wall will be able to tell us who is the fairest of them all for a long, long time. A mirror-maker's average life span was no longer than 10 working years. The discovery of metals yielded polished sheets which served well until sometime in the 12th century when it was discovered that glass with a metal backing produced a near perfect image. Both directly and indirectly, Liebig was an influential figure in the development of scientific agriculture and, thus, in increasing food production at a time when a rising European population was undergoing vast urban and industrial expansion. * In his 1847 publication Chemische Untersuchung über das Fleisch (Research on the Chemistry of Food), Liebig described a particular “extract of meat” prepared by low-pressure evaporation of the soup from lean meat, and he claimed it to be a valuable restorative for the sick, wounded, and ill-nourished. In this work, Liebig employed analyses and highly speculative equations in an attempt to unravel the metabolic routes by which foodstuffs were transformed into flesh and blood and whereby tissues were degraded into animal heat, muscular work, and secretions and excretions. It is believed that people in Anatolia, which is now Turkey, made the first mirrors. Which one should I buy? Vanity was instantly born and the search for better reflective materials was underway. By analyzing soils, Liebig showed that the prevailing “humus theory” in which a plant’s carbon content was claimed to have originated principally from leaf mould, and not from atmospheric photosynthesis, was fallacious. Or Better Yet, Why is the Ocean Blue. Liebig’s aphorism of 1843, that the measure of a country’s civilization lay in the amount of sulfuric acid it consumes every year, became widely known. Statues were erected in his honour at Darmstadt, Giessen, and Munich. formula which U. S. manufacturers used last year, little changed, to Reaction of the silver with sulfur compounds in the air can result in the formation of dark, non-reflective silver sulfide. Today most mirrors are made of glass, coated with either a chemically deposited…, …mid-19th century the German chemist Justus von Liebig commented that the wealth of a nation could be gauged by the amount of sulfuric acid it produced. von Steinheil. Presto, a mirror was born! As soon as a new method was discovered, this one was banned. Since the presence of water speeds up the tarnishing reaction, the reflective surface suffers. If you are accessing TIME.com on a public computer, you are advised not to click on the "Remember me" option. von Liebig made the first modern mirror 105 years ago, he poured his In the same decade Liebig also improved the commercial processing of artificial milk for infants, the baking of whole-meal bread, and the silvering of mirrors. Mirrors were later made from polished copper by Ancient Egyptians. In 1852, fatigued from teaching, he moved to the University of Munich, where he no longer offered practical instruction but pursued his own interests and concentrated upon popular lecturing and writing. As editor of the monthly Annalen der Pharmacie und Chemie, which he founded in 1832 and which continued until 1998 as Liebigs Annalen, he publicized both his own work and that of his pupils while also using its pages to criticize the work of other chemists. When famed German Chemist Baron Justus von Liebig made the first modern mirror 105 years ago, he poured his new silvering solution from a laboratory beaker on a pane of glass, gave humanity the best look at itself it had ever had. One of the byproducts of the reaction turned out to be ammonium nitrate which is explosive! He applied a solution of silver nitrate in ammonia to the glass and exposed this to vapours of formaldehyde. Want to engage with this content? When famed German Chemist Baron Justus new silvering solution from a laboratory beaker on a pane of glass, Comment on this on our Facebook page! gave humanity the best look at itself it had ever had. He applied a solution of silver nitrate in ammonia to the glass and exposed this to vapours of formaldehyde. A false hypothesis in science can often be fruitful; by demonstrating the errors of Liebig’s schemes, many important principles were discovered. Justus von Liebig’s inventions: •silver mirror (which replaced the mercury mirror) •meat extract (bouillon) which he called fleish extract •baby food which was a substitute for mother’s milk •meat infusion for seriously ill patients •baking powder •corrosion-resistant alloy of Ni and Fe (a precursor to stainless steel)
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