Atomic Weights and Factors--Useful Data--Chemical Calculations--Rules for Indirect Analysis--Weights and Measures--Thermometers and Barometers--Chemical Physics--Boiling Points, etc.--Solubility of Substances--Methods of Obtaining Specific Gravity--Conversion of Hydrometers--Strength of Solutions by Specific Gravity-Analysis--Gas Analysis--Water Analysis--Qualitative Analysis and Reactions--Volumetric Analysis--Manipulation--Mineralogy--Assaying--Alcohol-- Beer--Sugar--Miscellaneous Technological matter relating to Potash, Soda, Sulphuric Acid, Chlorine, Tar Products, Petroleum, Milk, Tallow, Photography, Prices, Wages, etc., etc. * * * * * _Algebra Self-Taught._ By W. P. HIGGS, M.A., D.Sc., LL.D., Assoc. Inst. C.E., Author of ‘A Handbook of the Differential Calculus,’ etc. Crown 8vo, cloth, 2_s._ 6_d._ CONTENTS: 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, 6_d._ * * * * * _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, 5_s._ 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, 5_s._ CONTAINING: