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The Steam Engine considered as a Heat Engine : a

Treatise on the Theory of the Steam Engine, illustrated by Diagrams, Tables, and Examples from Practice. By Jas. H, COTTERILL, M.A., F.R.S., Professor of Applied Mechanics in the Royal Naval College 8vo, cloth, 125. 6d.

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, Second 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.

Health and Comfort in House Building, or Ventila

tion with Warm Air by Self-Acting Suction Porver, 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.

Second edition, with Supplement, with plates, demy Svo, cloth, 75. 6.. Treatise or 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 Suminary-On Calculations of the Numbers for Wheels and Pinions: their Proportional Sizes, Trains, etc. Or Dial Wheels, or Motion Work-Length of Time of Going without Winding 11p-The Verge-The Horizontal-The Dupler-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.

Spons' Engineers' and Contractors' Illustrated Book

of Prices of Machines, Tools, Ironwork, and Contractors'. Material; and Engineers' Directory. Third edition, 4to, cloth, 6s.

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, 25. 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 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.


la super-royal 8vo, 1168 pp, with 2400 illustrations, in 3 Divisions, cloth, price 135. 6d.

each ; or 1 vol., cloth, al. ; or half-morocco, al. 8s.




Cibil, Mechanical, Military, and Nabal.

EDITED BY ERNEST SPON, MEMB. Soc. ENGINEERS. The success which has attended the publication of 'SPONS' DICTIONARY OF ENGINEERING' has encouraged the Publishers to use every effort tending to keep the work up to the standard of existing professional knowledge. As the Book has now been some years before the public without addition or revision, there are many subjects of importance which, of necessity, are either not included in its pages, or have been treated somewhat less fully than their present importance demands. With the object, therefore, of remedying these omissions, this Supplement is now being issued. Each subject in it is treated in a thoroughly comprehensive way; but, of course, without repeating the information already included in the body of the work.

The new matter comprises articles upon Abacus, Counters, Speed Coal Mining.

Lighthouses, Buoys, and Indicators, and Slide Coal Cutting Machines. Beacons. Rule.

Coke Ovens. Copper. Machine Tools. Agricultural Implements Docks. Drainage. Materials of Construc.

and Machinery Dredging Machinery. tion. Air Compressors. Dynamo - Electric and Meters. Animal Charcoal Ma. Magneto-Electric Ma. Ores, Machinery and chinery. chines.

Processes employed to Antimony. Dynamometers.

Dress. Axles and Axle-boxes. Electrical Engineering, Piers. Barn Machinery.

Telegraphy, Electric Pile Driving. Belts and Belting.

Lighting and its prac. í Pneumatic TransmisBlasting. Boilers.

ticaldetails, Telephones sion.
Engines, Varieties of.

Brick Machinery.
Explosives. Fans.


Founding, Moulding and Road Locomotives. Cages for Mines.

the practical work of Rock Drills. Calculus, Differential and the Foundry

Rolling Stock. Integral

Gas, Manufacture of. Sanitary Engineering. Canals.

Hammers, Steam and Shafting. Carpentry.

other Power.

Steel. Cast Iron.

Heat. Horse Power. Steam Navvy. Cement, Concrete, Hydraulics.

Stone Machinery. Limes, and Mortar. Hydro-geology.

Chimney Shafts.

Indicators. Iron. Well Sinking.
Coal Cleansing and Lifts, Hoists, and Eleva.



With nearly 1500 illustrations, in super-royal Svo, in 5. Divisions, clot Divisions i to 4, 135. 6d. each ; Division 5,175. 6d. ; or 2 vols., cloth, 63 10s


PRODUCTS. EDITED BY C. G. WARNFORD LOCK, F.L.S. Among the more important of the subjects treated of, are the following Acids, 207 pp. 220 figs. Fur, 5 pp:

Photography, 13 pp. 20 Alcohol, 23 pp. 16 figs. Gas, Coal, 8 pp.

figs. Alcoholic Liquors, 13 pp. Gems.

Pigments, 9 pp. 6 figs. Alkalies, 89 pp. 78 figs. Glass, 45 pp. 77 figs. Pottery, 46 pp. 57 figs. Alloys. Alum. Graphite, 7 PP.

Printing and Engraving, Asphalt. Assaying Hair, 7 pp.

20 pp. 8 figs. Beverages, 89 pp. 29 figs. Hair Manufactures. Rags. Blacks.

Hats, 26 pp. 26 figs. Resinous and Gummy Bleaching Powder, 15 pp. Honey. Hops.

Substances, 75 pp. 16 Bleaching, 51 pp. 48 figs. Horn.

Candles, 18 pp. 9 figs. Ice, 10 pp. 14 figs. Rope, 16 pp. 17 figs.
Carbon Bisulphide. Indiarubber Manufac- Salt, 31 pp. 23 figs.
Celluloid, 9 PP:

tures, 23 pp. 17 figs.

Silk, 8 pp. Cements. Clay. Ink, 17 PP.

Silk Manufactures, 9 pp. Coal-tar Products, 44 pp. Ivory.

i figs. 14 figs.

Jute Manufactures, 11 Skins, 5 pp.
Cocoa, 8
PP., II figs.

Small Wares, 4 pp. Coffee, 32 pp. 13 figs. Knitted Fabrics Soap and Glycerine, 39 Cork, 8 pp. 17 figs. Hosiery, 15 pp. 13 figs.

pp. 45 figs. Cotton Manufactures, 62 Lace, 13 pp. 9 figs. Spices, 16 pp. pp. 57 figs.

Leather, 28 pp. 31 figs. Sponge, 5 pp. Drugs, 38 pp.

Linen Manufactures, 16 Starch, 9 pp. 10 figs.
Dyeing and

pp. 6 figs.

Sugar, 155 pp. 134
Printing, 28 pp. 9 figs. Manures, 21 pp. 30 figs.

figs. Dyestuffs, 16 pp. Matches, 17 pp, 38 figs. Sulphur, Electro-Metallurgy, 13 Mordants, 13 pp.

Tannin, 18 pp.
Narcotics, 47 pp.

Tea, 12 PP.
Explosives, 22 PP. 33 figs. Nuts, 10 pp.

Timber, 13 pp. Feathers,

Oils and Fatty Sub- Varnish, 15 PP.
Fibrous Substances, 92 stances, 125 pp.

Vinegar, 5 PP:

Wax, 5 pp.
Floor-cloth, 16 pp, 21 Paper, 26 pp. 23 figs.

Wool, 2 PP. figs.

Paraffin, 8 pp. 6 figs. Woollen Manufactures,
Food Preservation, 8 pp. Pearl and Coral, 8 pp. 58 pp. 39 figs.
Fruit, 8 pp.

Perfumes, 10 pp.
London: E. & F. N. SPON, 16, Charing Cross.

New York : 44, Murray Street,

pp. 79 figs.

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