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A MANUAL OF THE HAND LATHE. Comprising Concise Directions for Working Metals of all kinds, Ivory, Bone, and Precious Woods ; Dyeing, Coloring, and French Polishing, Inlaying by Veneers, and various Methods Practiced to Produce Elaborate Work with dispatch and at a small expense. By Egbert P. Watson, Late of the SCIENTIFIC AMERICAN, Author of "The Modern Practice of Machinists and Engineers." Illustrated by Soventy-eight Engravings. Philadelphia: Henry Carey Baird, Industrial Publisher, 406 Walnut street. London : Sampson, Low, Son & Marston, Crown Buildings, 188 Fleet street. Price $1-50. This workis eminently practical, and the inlormatio given Is based upon the experience of the author. A brief extract from the work on the "Gluing in of Veneers," published in another column, will give a good Idea of the plain and practical character ofthe book, and when we add that the subjects enumerated in the title above set forth are treated in the same clear and practical manner, -we ha\'c said enough to convince the common-sense mechanic of the value of the work. THE CHEMICAL FORCES—HEAT, LIGHT, ELECTRICITY. With their Applications to the Expansion, Liquefaction, and Vaporization of Solids ; the Steam Engine, Photography, Spectrum Analysis, the Galvanic Battery, Electro-Plating, the Electrical Illumination of Light-Houses, the Fire Alarm of Cities, the Atlantic Telegraph, an Introduction to Chemical Physics. Designed for the Use of Academies, Colleges, and Medical Schools. Illustrated with numerous Engravings, and containing Copious Lists of Experiments, with Directions for Preparing them., By Thomas Ruggles Pynchon, M. A., Scovill Professor of Chemistry and the Natural Sciences, Trinity College, Hartford, Conn. Published by O. D. Case & Co. A scientific book adapted to the student as well as the general reader is difficult to prepare. The author of this work has, however, shown himself skillful in meeting the difficulties of his task, though we think he displays something too much of caution in his discussion of modern views of the nature of molecular forces. In fact he can hardly be said to discuss them, contenting himself with their enunciation merely. In a work of, this kind It would have been more satisfactory to have seen some more space given to this important subject. The correlation, convertibility, and equivalency of the physical forces are, however,well discussed. As the title promises , the industrial application of tlie chemical forces are noticed at considerable length, and It has been the aim of the author to produce a book not requiring of its reader an extensive knowledge of mathematics; it is well adapted to the use of the general reader. We notice that points liable to give dillicultyto those not familiar with the subject aretreatedwith special care, and are elucidated as only a teacher who has been accustomed to show pupils the way out of such difficulties could elucidate them. This is a valuable feature ofthe work, and one which will be appreciated by Mr. Pynchon's readers. We recommend the work as one ofthe best text-books we have met with upoI) the subject of which it treats. STUDIER I GRUFBRYTNINGBVETENSKAP No. 2. UEBER GBS-TEINSBOHRMASCHINEN. Von Dr. phil. F. M. Stapff, Ascultant in der Bergabtheilung des Commercecolle-giums. Mit Atlas enthaltend 11 theils Lithografirte theils ueberdrueckte Tafeln. Stockholm: A. Bonnier, 1869. [A TREATISE ON ROCK-DRILLING MACHINERY. By F. M. Stapff, AscMltrat in the Mining Department of the Royal Commercial College. With an Atlas containing 11 sheets of Lithograph Plates. Stockholm : A. Bonnier, Publisher, 1869.] This is a very copious and comprehensive treatise in the German language on roek drillin.g and cuttln", with especial reference to mining, tun. nellng, etc., etc. The methods employed in the most celebrated works of this character are described, and the machinery discussed and illustrated In detail. The atlas sheets are large folio, each containing a large number of finely-executed drawings. The work Jis one admirably adapted to the use of engineers, andwell merits an En,gli8h translation. THE AMERICAN BUILDER. Published by Charles D. Lakey, Chicago, Ill. Terms, $3-00 per annum. The above is one of our most interesting exchanges, and we are please to learn that it is meeting with well deserved success. Caveats are desirable if an inventor is not fnlly prepared to apply for his "patent. A Caveat affords protection for one year against the issue of a patent to another for the same invention. Patent fee on fllinfi. It Caveat, SIO. Agency tng and filing the juments from 10 to m. Addrels MTO & CO.. W far": Be Y orfc Xnventona Examined Rt tbe PateBt Offlce.Tnventors can have a careful search made at the Patent Office into the novelty of their inven- tioDF, and receive a report in writing as to the probable success of an application. Send sketch and n bymail,inclo8ing fee of $5. MresB Ca,87 Irk Bow. New York
