. Pittsburgh and Allegheny in the centennial year . , in 1841, and under an improvement by J. Wood Brothers, in imitation of Russia sheet iron then made by this establishment, although equalin appearance to the imported article, would not resist the action of the atmos-phere as well. This difficulty was partially overcome in 1861 through experi-ments by the present proprietor of the works. Other improvements werepatented in 1865-6T, but the required result was not obtained until 1873,through the present mode of manufacture, the principle feature of which isplanishing by hammers. The g
. Pittsburgh and Allegheny in the centennial year . , in 1841, and under an improvement by J. Wood Brothers, in imitation of Russia sheet iron then made by this establishment, although equalin appearance to the imported article, would not resist the action of the atmos-phere as well. This difficulty was partially overcome in 1861 through experi-ments by the present proprietor of the works. Other improvements werepatented in 1865-6T, but the required result was not obtained until 1873,through the present mode of manufacture, the principle feature of which isplanishing by hammers. The growth of this important branch of Pittsburghsmanufactures is the result of tliirty years experimenting and study on the part ofthe inventor, and the effect is that Pittsburgh is the only point in the countrywhere an article of jdanished sheet iron is produced fully equal to the bestRussia iron, and .-io endorsed by the heaviest metal dealers and consumersin the country. In the growing that the United States will, within. O M< M i-i.
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Keywords: ., bookcentury1800, bookdecade1870, bookidpittsburghal, bookyear1876
