Wells's Principles And Applications of Chemistry: for the Use of Academies, High-Schools, And ...
Wells's Principles And Applications of Chemistry: for the Use of Academies, High-Schools, And ...
David Ames Wells
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Whab is said of the early history of bleaching ? Hosted by Google 250 INORGANIC CHEMISTRY. One of the improvements in bleaching introduced by the Dutch was that of "souring," which consisted in steeping the goods for a considerable length of time in sour milk; but about the year IT 50, very dilute sulphuric acid wai substituted in its place. This simple change was a most important discovery, inasmuch as it shortened the time required for bleaching linen by nearly threu months, and greatly reduc...ed the expense. In fact, the operation of " souring' i by sulphuric acid still forms an essential feature of the modern processes o^ bleaching. ^' In 1*785, Berthollet, a French chemist, wliile repeating some experiments on chlorine, which had been discovered by Scheele in 11 14, ascertained that a1 solution of this gas in water was capable of destroying vegetable colors, and he was hence led to suggest its application to bleaching. About this time Berthollet was visited by James Watt, of England, celebrated from his connect-; tion with the steam-engine, to whom he related the results of his experiments^.
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