The Science record; a compendium of scientific progress and discovery . isco, is as follows : Placethe previously pulverized ore in a vessel, and moisten itwith water, fn order to render the chlorination of the massmore active. Then inject chlorine gas or an aqueous so-lution of chlorine until the ore has been saturated, and in-troduce dry steam or hot air in order to expel the excess ofchlorine, which will leave the metals in the form of chlo-rides, and free from sulphur. Metallic iron is now intro-duced into the pulp and allowed to remain until the chlo-rides thus formed are decomposed, thus
The Science record; a compendium of scientific progress and discovery . isco, is as follows : Placethe previously pulverized ore in a vessel, and moisten itwith water, fn order to render the chlorination of the massmore active. Then inject chlorine gas or an aqueous so-lution of chlorine until the ore has been saturated, and in-troduce dry steam or hot air in order to expel the excess ofchlorine, which will leave the metals in the form of chlo-rides, and free from sulphur. Metallic iron is now intro-duced into the pulp and allowed to remain until the chlo-rides thus formed are decomposed, thus leaving the metalsin a suitable condition to be readily amalgamated. Bythis process, it is stated, a higher percentage of the pre-cious metals can be extracted than has ever heretoforebeen obtained by raw amalgamation. Bcettgers Portable Ink.—The author saturates sev-eral sheets of paper with aniline-black, and presses themtogether into a compact and portable mass. For writing,it is merely necessary to tear off a piece of this paper, andsteep it in a little >EPH GILLOT FOUNDER OF THE STEEL-PEN INDUSTRY. TECHNOLOGY. MANUFACTURE OF FILES. The manufacture of files has hitherto been almost wholly-monopolized by England, but the goods now made in theUnited States are rapidly driving the English article outof market. Several establishments on this side the waterare now turning out files in large quantities, and of supe-rior quality. Among these we may mention the ChicagoFile-Works. The company use both English and American steel intheir operations. The former, being of a more uniformquality, is used in files of the finest grades, and thosewhich are required for the hardest work. Files from threeinches to thirty-six inches in length, embracing everykind, form, and cut known to the trade, are made, the pri-ces running from 84cents to $35 per dozen. The companyis now using eighty tons of steel annually in its business,and manufactures 3500 dozen files of all grades duringt
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