Metrical Units and Systems, etc.

MODERN METROLOGY : A Manual of the Metrical Units and Systems of the present Century. With an Appendix containing a proposed English System. By Lowis D'A. Jackson, A.-M. Inst. C.E., Author of " Aid to Survey Practice," etc. Large Crown 8vo, 12s. 6d. cloth. [Just published.

Gregory's Practical Mathematics

MATHEMATICS for PRACTICAL MEN ; being a Common-place Book of Pure and Mixed Mathematics. Designed chiefly for the Use of Civil Engineers, Architects, and Surveyors. Part I. Pure Mathematics - comprising Arithmetic, Algebra, Geometry, Mensuration, Trigonometry, Conic Sections, Properties of Curves. Part II. Mixed Mathematics - comprising Mechanics in general, Statics, Dynamics, Hydrostatics, Hydrodynamics, Pneumatics, Mechanical Agents, Strength of Materials, etc. By Olinthus Gregory, LL.D., F.R.A.S. Enlarged by H. Law, C.E. 4th Edition, revised by Prof. J. R. Young. With 13 Plates. 8vo, 1l. 1s. cloth.

Mathematics As Applied To The Constructive Arts

A TREATISE ON MATHEMATICS AS APPLIED TO THE CONSTRUCTIVE ARTS. Illustrating the various processes of Mathematical Investigation by means of Arithmetical and simple Algebraical Equations and Practical Examples, etc. By Francis Campin, C.E. 12mo, 3s. 6d. cloth. Just published.

Geometry for the Architect, Engineer, etc.

PRACTICAL GEOMETRY, for the Architect, Engineer, and Mechanic. By E. W. Tarn, M. A. With Appendices on Diagrams of Strains and Isometrical projection. Demy 8vo, 9s. cloth.

The Metric System

A SERIES OF METRIC TABLES, in which the British Standard Measures and Weights are compared with those of the Metric System at present in use on the Continent. By C. II. Dowling, C.E. 2nd Edit., revised and enlarged. 8vo, 10s. 6d. cl.

Inwood's Tables, greatly enlarged and improved.

TABLES FOR THE PURCHASING of ESTATES, Freehold, Copyhold, or Leasehold; Annuities, Advowsons, etc., and for the Renewing of Leases; also for Valuing Reversionary Estates, Deferred Annuities, etc. By William Inwood. 21st edition, with Tables of Logarithms for the more Difficult Computations of the Interest of Money, etc. By M. Fedor Thoman. 12mo. 8s. cloth. "Those interested in the purchase and sale of estates, and in the adjustment of compensation cases, as well as in transactions in annuities, life insurances, etc, will find the present edition of eminent service." - Engineering.

Weights, Measures, Moneys, etc.

MEASURES, WEIGHTS, and MONEYS of all NATIONS, and an Analysis of the Christian, Hebrew, and Mahometan Calendars. Entirely New Edition, Revised and Enlarged. By \V. S. B. Woolhouse, F.R.A.S. 12mo, 2s. 6d. cloth boards.

Compound Interest And Annuities

THEORY of COMPOUND INTEREST and ANNUITIES; with Tables of Logarithms for the more Difficult Computations of Interest, Discount, Annuities, etc, in all their Applications and Uses for Mercantile and State Purposes. By Fedor Thoman, of the Societe Credit Mobilier, Paris. 3rd Edit., 12mo, 4s. 6d. cl.

Iron and Metal Trades1 Calculator.

THE IRON AND METAL TRADES' COMPANION: Being a Calculator containing a Series of Tables upon a new and comprehensive plan for expeditiously ascertaining the value of any goods bought or sold by weight, from 1s. per cwt. to 112s. per cwt., and from one farthing per lb. to 1s. per lb. Each Table extends from one lb. to 100 tons. By T. Downie. 396 pp., 9s., leather. "Will supply a want, for nothing like it before existed." - Building News.