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Mechanical Graphics. A Second Course of Mechanical Drawing. With Preface by Prof. PERRY, B.Sc., F.R.S. Arranged for use in Technical and Science and Art Institutes, Schools and Colleges, by GEORGE HALLIDAY, Whitworth Scholar. 8vo, cloth, 6s.

The Assayers Manual: an Abridged Treatise on the Docimastic Examination of Ores and Furnace and other Artificial Products. By BRUNO KERL. Translated by W. T. BRANNT. With 65 illustrations, 8vo, cloth, 12s. 6d.

Dynamo-Electric Machinery: a Text-Book for Students of Electro-Technology. By SILVANUS P. THOMPSON, B.A., D.Sc., M.S.T.E. [New edition in the press.

The Practice of Hand Turning in Wood, Ivory, Shell, etc., with Instructions for Turning such Work in Metal as may be required in the Practice of Turning in Wood, Ivory, etc.; also an Appendix on Ornamental Turning. (A book for beginners.) By FRANCIS CAMPIN. Third edition, with wood engravings, crown 8vo, cloth, 6s.

CONTENTS:

On Lathes--Turning Tools--Turning Wood--Drilling--Screw Cutting-- Miscellaneous Apparatus and Processes--Turning Particular Forms-- Staining--Polishing--Spinning Metals--Materials--Ornamental Turning, etc.

Treatise on Watchwork, Past and Present. By the Rev. H. L. NELTHROPP, M.A., F.S.A. With 32 illustrations, crown 8vo, cloth, 6s. 6d.

CONTENTS:

Definitions of Words and Terms used in Watchwork--Tools--Time-- Historical Summary--On Calculations of the Numbers for Wheels and Pinions; their Proportional Sizes, Trains, etc.--Of Dial Wheels, or Motion Work--Length of Time of Going without Winding up--The Verge--The Horizontal--The Duplex--The Lever--The Chronometer-- Repeating Watches--Keyless Watches--The Pendulum, or Spiral Spring-- Compensation--Jewelling of Pivot Holes--Clerkenwell--Fallacies of the Trade--Incapacity of Workmen--How to Choose and Use a Watch, 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. Second edition, crown 8vo, cloth, 2s. 6d.

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 Binomial 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 Formulae, etc.

Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval; with technical terms in French, German, Italian, and Spanish, 3100 pp., and nearly 8000 engravings, in super-royal 8vo, in 8 divisions, 5l. 8s. Complete in 3 vols., cloth, 5l. 5s. Bound in a superior manner, half-morocco, top edge gilt, 3 vols., 6l. 12s.

Notes in Mechanical Engineering. Compiled principally for the use of the Students attending the Classes on this subject at the City of London College. By HENRY ADAMS, Mem. Inst. M.E., Mem. Inst. C.E., Mem. Soc. of Engineers. Crown 8vo, cloth, 2s. 6d.

Canoe and Boat Building: a complete Manual for Amateurs, containing plain and comprehensive directions for the construction of Canoes, Rowing and Sailing Boats, and Hunting Craft. By W. P. STEPHENS. With numerous illustrations and 24 plates of Working Drawings. Crown 8vo, cloth, 9s.

Proceedings of the National Conference of Electricians, Philadelphia, October 8th to 13th, 1884. 18mo, cloth, 3s.

Dynamo-Electricity, its Generation, Application, Transmission, Storage, and Measurement. By G. B. PRESCOTT. With 545 illustrations. 8vo, cloth, 1l. 1s.

Domestic Electricity for Amateurs. Translated from the French of E. HOSPITALIER, Editor of "L'Electricien," by C. J. WHARTON, Assoc. Soc. Tel. Eng. Numerous illustrations. Demy 8vo, cloth, 6s.

CONTENTS:

1. Production of the Electric Current--2. Electric Bells--3. Automatic Alarms--4. Domestic Telephones--5. Electric Clocks--6. Electric Lighters--7. Domestic Electric Lighting--8. Domestic Application of the Electric Light--9. Electric Motors--10. Electrical Locomotion--11. Electrotyping, Plating, and Gilding--12. Electric Recreations--13. Various applications--Workshop of the Electrician.

Wrinkles in Electric Lighting. By VINCENT STEPHEN. With illustrations. 18mo, cloth, 2s. 6d.

CONTENTS:

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Foundations and Foundation Walls for all classes of Buildings, Pile Driving, Building Stones and Bricks, Pier and Wall construction, Mortars, Limes, Cements, Concretes, Stuccos, &c. 64 illustrations. By G. T. POWELL and F. BAUMAN. 8vo, cloth, 10s. 6d.

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Ten Years' Experience in Works of Intermittent Downward Filtration. By J. BAILEY DENTON, Mem. Inst. C.E. Second edition, with additions. Royal 8vo, cloth, 5s.

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The Fireman's Guide; a Handbook on the Care of Boilers. By TEKNOLOG, foereningen T. I. Stockholm. Translated from the third edition, and revised by KARL P. DAHLSTROM, M.E. Second edition. Fcap. 8vo, cloth, 2s.

A Treatise on Modern Steam Engines and Boilers, including Land Locomotive, and Marine Engines and Boilers, for the use of Students. By FREDERICK COLYER, M. Inst. C.E., Mem. Inst. M.E. With 36 plates. 4to, cloth, 12s. 6d.

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Health and Comfort in House Building; or, Ventilation with Warm Air by Self-acting Suction Power. With Review of the Mode of Calculating the Draught in Hot-air Flues, and with some Actual Experiments by J. DRYSDALE, M.D., and J. W. HAYWARD, M.D. With plates and woodcuts. Third edition, with some New Sections, and the whole carefully Revised, 8vo, cloth, 7s. 6d.

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Gas and Petroleum Engines: A Practical Treatise on the Internal Combustion Engine. By WM. ROBINSON, M.E., Senior Demonstrator and Lecturer on Applied Mechanics, Physics, &c., City and Guilds of London College, Finsbury, Assoc. Mem. Inst. C.E., &c. Numerous illustrations. 8vo, cloth, 14s.

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A Treatise on the Richards Steam-Engine Indicator and the Development and Application of Force in the Steam-Engine. By CHARLES T. PORTER. Fourth Edition, revised and enlarged, 8vo, cloth, 9s.

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