the guide flag* and keeping her course at the rate of ten knots an hour, while the rest of the fleet, putting their helms to port simultaneously, come N.E. and reduce their speed to seven knots an hour. * At night a large lantern must take the place of the guide-flag. Whenever any division, squadron or vessel of the fleetother than the reserve-is intended to be released from obedience to a general signal, its distinguishing pennant must be hoisted below the signal. Any book in this Catalogue sent free by mail on receipt of price. VALUABLE SCIENTIFIC BOOKS, PUBLISHED BY D. VAN NOSTRAND, 23 MURRAY STREET AND 27 WARREN STREET, FRANCIS. Lowell Hydraulic Experiments, being a selection from Experiments on Hydraulic Motors, on the Flow of Water over Weirs, in Open Canals of Uniform Rectangular Section, and through submerged Orifices and diverging Tubes. Made at Lowell, Massachusetts. By James B. Francis, C. E. 2d edition, revised and enlarged, with many new experiments, and illustrated with twenty-three copperplate engravings. I vol. 4to, cloth. .$15 00 ROEBLING (J. A.) Long and Short Span Railway CLARKE (T. C.) Description of the Iron Railway TUNNER (P.) A Treatise on Roll-Turning for the Manufacture of Iron. By Peter Tunner. Translated and adapted by John B. Pearse, of the Penn 25 00 7 50 D. VAN NOSTRAND'S PUBLICATIONS. ylvania Steel Works, with numerous engravings wood cuts and folio atlas of plates. . ISHERWOOD (B. F.) Engineering Precedents for Steam Machinery. Arranged in the most practical and useful manner for Engineers. By B. F. Isherwood, Civil Engineer, U. S. Navy. With Illustrations. Two volumes in one. 8vo, cloth... BAUERMAN. Treatise on the Metallurgy of Iron, containing outlines of the History of Iron Manufacture, methods of Assay, and analysis of Iron Ores, processes of manufacture of Iron and Steel, etc., etc. By H. Bauerman. First American edition. Revised and enlarged, with an Appendix on the Martin Process for making Steel, from the report of Abram S. Hewitt. Illustrated with numerous wood engravings. 12mo, cloth.. By CAMPIN on the Construction of Iron Roofs. CIPHER AND SECRET LETTER AND TELE- By COLBURN. The Gas Works of London. By Zeral CRAIG (B. F) Weights and Measures. An account GLYNN (J.) Treatise on the Power of Water, as ap- 2 $10 00 $2 50 2. 00 3 00 75 I OO 60 50 2 00 D. VAN NOSTRAND'S PUBLICATIONS. 12mo, cloth. Glynn. Third edition, revised and enlarged, with numerous illustrations. HUMBER. A Handy Book for the Calculation of Strains in Girders and similar Structures, and their Strength, consisting of Formulæ and corresponding Diagrams, with numerous details for practical application. By William Humber. 12mo, fully illus trated, cloth. GRUNER. The Manufacture of Steel. By M. L. Gruner. Translated from the French, by Lenox Smith, with an appendix on the Bessamer process in the United States, by the translator. Illustrated by Lithographed drawings and wood cuts. 8vo, cloth.. AUCHINCLOSS. Link and Valve Motions Simplified. Illustrated with 37 wood-cuts, and 21 lithographic plates, together with a Travel Scale, and numerous useful Tables. By W. S. Auchincloss. 8vo, cloth.. VAN BUREN. Investigations of Formulas, for the strength of the Iron parts of Steam Machinery. By J. D. Van Buren, Jr., C. E. Illustrated, 8vo, cloth. JOYNSON. Designing and Construction of Machine Gearing. Illustrated, 8vo, cloth........ GILLMORE. Coignet Beton and other Artificial Stone. By Q. A. Gillmore, Major U. S. Corps Engineers. 9 plates, views, &c. 8vo, cloth... SAELTZER. Treattse on Acoustics in connection with Ventilation. By Alexander Saeltzer, Architect. 12mo, cloth... THE EARTH'S CRUST. A handy Outline of Geo- FRANCIS. On the Strength of Cast-Iron Pillars, with D. VAN NOSTRAND'S PUBLICATIONS. GILLMORE (Gen. Q. A.) Treatise on Limes, Hy- HEWSON (Wm.) Principles and Practice of Embank $4.00 I 50 3.00 2 00 HOLLEY (A. L.) Railway Practice. American and European Railway Practice, in the economical Generation of Steam, including the Materials and Construction of Coal-burning Boilers, Combustion, the Variable Blast, Vaporization, Circulation, Superheating, Supplying and Heating Feed-water, etc., and the Adaptation of Wood and Coke-burning Engines to Coal-burning; and in Permanent Way, including Road-bed, Sleepers, Rails, Joint-fastenings, Street Railways, etc., etc. By Alexander L. Holley, B. P. With 77 lithographed plates. I vol. folio, cloth.... 12 00 KING (W. H.) Lessons and Practical Notes on Steam, the Steam Engine, Propellers, etc., etc., for Young Marine Engineers, Students, and others. By the late W. H. King, U. S. Navy. Revised by Chief Engineer J. W. King, U. S. Navy. Twelfth edition, enlarged. 8vo, cloth. MINIFIE (Wm.) Mechanical Drawing. A Text-Book of Geometrical Drawing for the use of Mechanics ... 2 00 |