Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than 200 of the oldest leading academic journals. The works date from the mid--seventeenth to the early twentieth centuries. We encourage people to read and share the Early Journal Content openly and to tell others that this resource exists. People may post this content online or redistribute in any way for non--commercial purposes. Read more about Early Journal

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... ntent at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. 68 SCIENCE. SCIENCE. for the treatment of iron and steel by this process. As the plant is small at present, attention is mainly given to small articles, such as steel and iron shingles for roofing, builders' hardware, artistic ironwork, furniture springs, polished parts of steamengines and other machinery, boiler-tubes, nuts and bolts, watermeters, steam-radiators, and similar easily handled articles; but the intention is to apply the process, on a larger scale, to architectural and structural iron and steel, telegraph wire, and probably to iron and steel plates for boiler construction, shipbuilding, and similar uses. As described by Professor Haupt and Dr. Gesner, this process does not produce a magnetic oxide upon the surface of the metal, as is the case in other processes for making iron rust-proof, nor does it alter the dimensions of the articles treated. It changes the body of the surface of the metal into a compound of hydrogen, iron, and carbon, which is designated a double carbide of hydrogen and iron, as determined by analysis. Being an integral part of the metal, it cannot scale or peel off; and it prevents indefinitely the rusting of the metal through exposure to the for the treatment of iron and steel by this process. As the plant is small at present, attention is mainly given to small articles, such as steel and iron shingles for roofing, builders' hardware, artistic ironwork, furniture springs, polished parts of steamengines and other machinery, boiler-tubes, nuts and bolts, watermeters, steam-radiators, and similar easily handled articles; but the intention is to apply the process, on a larger scale, to architectural and structural iron and steel, telegraph wire, and probably to iron and steel plates for boiler construction, shipbuilding, and similar uses. As described by Professor Haupt and Dr. Gesner, this process does not produce a magnetic oxide upon the surface of the metal, as is the case in other processes for making iron rust-proof, nor does it alter the dimensions of the articles treated. It changes the body of the surface of the metal into a compound of hydrogen, iron, and carbon, which is designated a double carbide of hydrogen and iron, as determined by analysis. Being an integral part of the metal, it cannot scale or peel off; and it prevents indefinitely the rusting of the metal through exposure to the