Page:Popular Science Monthly Volume 1.djvu/796



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Translated and edited, from the eighth German edition, with extensive Additions,

With 336 Illustrations. 1 vol., 8vo. 761 pages. (Nearly ready.)

The several editions of Professor Rudolf Wagner's "Handhuch der Chemischen Technologie" have succeeded each other so rapidly, that no apology is needed in offering a translation to the public.

Under the head of Metallurgic Chemistry, the latest methods of preparing Iron, Cobalt, Nickel, Copper, Copper Salts, Lead and Tin and their Salts, Bismuth, Zinc, Zinc Salts, Cadmium, Antimony, Arsenic, Mercury, Platinum, Silver, Gold, Manganates, Aluminum, and Magnesium, are described. The various applications of the Voltaic Current to Electro-Metallurgy follow under this division. The Preparation of Potash and Soda Salts, the Manufacture of Sulphuric Acid, and the Recovery of Sulphur from Soda-Waste, of course occupy prominent places in the consideration of chemical manufactures. It is difficult to over-estimate the mercantile value of Mond's process, as well as the many new and important applications of Bisulphide of Carbon. The manufacture of Soap will be found to include much detail. The Technology of Glass, Stoneware, Limes and Mortars, will present much of interest to the Builder and Engineer. The Technology of Vegetable Fibres has been considered to include the preparation of Flax, Hemp, Cotton, as well as Paper-making; while the applications of Vegetable Products will be found to include Sugar-boiling, Wine and Beer Brewing, the Distillation of Spirits, the Baking of Bread, the Preparation of Vinegar, the Preservation of Wood, etc.

Dr. Wagner gives much information in reference to the production of Potash from Sugar-residues. The use of Baryta Salts is also fully described, as well as the preparation of Sugar from Beet-roots. Tanning, the Preservation of Meat, Milk, etc., the Preparation of Phosphorus and Animal Charcoal, are considered as belonging to the Technology of Animal Products. The Preparation of the Materials for Dyeing has necessarily required much space; while the final sections of the book have been devoted to the Technology of Heating and Illumination.