Translated from the French, by William P. Craighill, U. S. Engineers, from the last French edition. Illustrated. 12mo, cloth 1 50 *DURYEA, Col. A.--Standing Orders of the Seventh Regiment National Guards.* New edition. 16mo, cloth 50 *EASSIE, P. B.--Wood and its Uses.* A Hand-Book for the use of Contractors, Builders, Architects, Engineers, and Timber Merchants. Upwards of 250 illustrations. 8vo, cloth 1 50 *EDDY, Prof. H. T.--Researches in Graphical Statics.* Embracing New Constructions in Graphical Statics, a New General Method in Graphical Statics, and the Theory of Internal Stress in Graphical Statics. 8vo, cloth 1 50 *ELIOT, Prof. C. W., and STORER, Prof. F. H.--A Compendious Manual of Qualitative Chemical Analysis.* Revised with the co-operation of the authors. By Prof. William R. Nichols. Illustrated. 12mo, cloth 1 50 *ELLIOT, Maj. GEO. H., U. S. E--European Light-House Systems.* Being a Report of a Tour of Inspection made in 1873. 51 engravings and 21 wood-cuts. 8vo, cloth 5 00 *ENGINEERING FACTS AND FIGURES.* An Annual Register of Progress in Mechanical Engineering and Construction for the years 1863-64-65-66-67-68. Fully illustrated 6 vols. 18mo, cloth (each volume sold separately), per vol: 2 50 *FANNING, J. T.--A Practical Treatise on Water-Supply Engineering.* Relating to the Hydrology, Hydrodynamics, and Practical Construction of Water-Works in North America. Third edition. With numerous tables and 180 illustrations. 650 pages. 8vo, cloth 5 00 *FISKE, Lieut. BRADLEY A., U. S. N.--Electricity in Theory and Practice; or, The Elements of Electrical Engineering.* 8vo, cloth 2 50 *FOSTER, Gen. J. G., U. S. A.--Submarine Blasting in Boston Harbor, Massachusetts.* Removal of Tower and Corwin Rocks. Illustrated with seven plates. 4to, cloth 3 50 *FOYE, Prof. J. C.--Chemical Problems.* With brief Statements of the Principles involved. Second edition, revised and enlarged. 16mo, boards 50 *FRANCIS, JAS. B., C. E.--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. Fourth edition, revised and enlarged, with many new experiments, and illustrated with twenty-three copperplate engravings. 4to, cloth 15 00 *FREE-HAND DRAWING.*