Symbols and the Signs of Operation—The Equation and the Unknown Quantity—Positive and Negative Quantities—Multiplication—Involution—Exponents—Negative Exponents—Roots, and the Use of Exponents as Logarithms—Logarithms—Tables of Logarithms and Proportionate Parts—Transformation of System of Logarithms—Common Uses of Common Logarithms—Compound Multiplication and the Binominal Theorem—Division, Fractions and Ratio—Continued Proportion—The Series and the Summation of the Series—Limit of Series—Square and Cube Roots—Equations—List of Formulæ, etc.

On Designing Belt Gearing. By E. J. Cowling Welch, Mem. Inst. Mech. Engineers, Author of ‘Designing Valve Gearing.’ Fcap. 8vo, sewed, 6d.

Arbitrations: a Text-book for Surveyors in Tabulated Form. By Banister Fletcher, F.R.I.B.A., Author of ‘Model Houses,’ etc. Crown 8vo, cloth, 5s.

Contents:

What matters may be submitted to Arbitration—Of the Submission—Of Revocation—Who may Arbitrate—Powers of the Arbitrators—Of Joint Arbitrators and Umpires—Of Evidence—Of the Award—Of Costs and Charges—Advice to Plaintiffs and Defendants—Appendix of Forms.

A Handbook of Formulæ, Tables, and Memoranda, for Architectural Surveyors and others engaged in Building. By J. T. Hurst, C.E. Twelfth edition. Royal 32mo, roan, 5s.

Containing:

Formulæ and Tables for the Strength of Materials, Roofs, Water Supply, Drainage, Gas, and other matters useful to Architects and Builders—Information connected with Sanitary Engineering—Memoranda on the several Trades used in Building, including a Description of Materials and Analyses for Prices of Builders’ Work—The Practice of Builders’ Measurement—Mensuration and the Division of Land—Tables of the Weights of Iron and other Building Materials—Constants of Labour—Valuation of Property—Summary of the Practice in Dilapidations—Scale of Professional Charges for Architects and Surveyors—Tables of English and French Weights and Measures.

“It is no disparagement to the many excellent publications we refer to, to say that in our opinion this little pocket-book of Hurst’s is the very best of them all, without any exception. It would be useless to attempt a recapitulation of the contents, for it appears to contain almost everything that anyone connected with building could require, and, best of all, made up in a compact form for carrying in the pocket, measuring only 5 in. by 3 in., and about ¾ in. thick, in a limp cover. We congratulate the author on the success of his laborious and practically compiled little book, which has received unqualified and deserved praise from every professional person to whom we have shown it.”—The Dublin Builder.