PART II. A Five to Ten Mile Set and a

Ten to Twenty Mile Set. 63 illus. viii + 72 pp.

=Switchboard Measuring Instruments= for Continuous and Polyphase Currents. By J. C. CONNAN. 117 illus. 150 pp. 8vo. (_1908_) _net_ 5 0

=Electric Cables, their Construction and Cost.= By D. COYLE and F. J. O. HOWE. With many diagrams and 216 tables, 466 pp. crown 8vo, leather. (_1909_) _net_ 15 0

=Management of Electrical Machinery.= By F. B. CROCKER and S. S. WHEELER. Eighth edition, 131 illus. 223 pp. crown 8vo. (_New York, 1909_) _net_ 4 6

=Electric Lighting=: A Practical Exposition of the Art. By F. B. CROCKER. Royal 8vo. (_New York._) Vol. I. =The Generating Plant.= Sixth edition, 213 illus. 470 pp. (_1904_) _net_ 12 6 Vol. II. =Distributing Systems and Lamps.= Second edition, 391 illus. 505 pp. (_1905_) _net_ 12 6

=The Care and Management of Ignition Accumulators.= By H. H. U. CROSS. 12 illus. 74 pp. crown 8vo. (S. & C. SERIES, No. 19.) (_1910_) _net_ 1 6

=Elements of Telephony.= By A. CROTCH. 51 illus. 90 pp. cr. 8vo. (S. & C. SERIES, No. 21.) (_1911_) _net_ 1 6

=Elementary Telegraphy and Telephony.= By ARTHUR CROTCH. New impression, 238 illus. viii + 223 pp. 8vo. (FINSBURY TECHNICAL MANUAL.) (_1912_) _net_ 4 6

=Electricity and Magnetism in Telephone Maintenance.= By G. W. CUMMINGS. 45 illus. 137 pp. 8vo. (_New York, 1908_) _net_ 6 6

=Grouping of Electric Cells.= By W. F. DUNTON. 4 illus. 50 pp. fcap. 8vo. (_1906_) _net_ 1 6

=Wireless Telegraphy for Intending Operators.= By C. K. P. EDEN. 20 illus. 80 pp. crown 8vo. (S. & C. SERIES, No. 24.) _In preparation._

=Magnets and Electric Currents.= By Prof. J. A. FLEMING. Second edition, 136 illus. 417 pp. crown 8vo. (_1902_) _net_ 5 0

=Notes on Design of Small Dynamo.= By GEORGE HALLIDAY. Second edition, 8 plates, 8vo. (_1895_) 2 6

=Practical Alternating Currents and Power Transmission.= By N. HARRISON. 172 illus. 375 pp. crown 8vo. (_New York, 1906_) _net_ 10 6

=Making Wireless Outfits.= By N. HARRISON. 27 illus. 61 pp. crown 8vo. (S. & C. SERIES, No. 11.) (_New York, 1909_) _net_ 1 6

=Wireless Telephone Construction.= By N. HARRISON. 43 illus. 73 pp. crown 8vo. (S. & C. SERIES, No. 12.) (_New York, 1909_) _net_ 1 6

=Testing Telegraph Cables.= By Colonel V. HOSKIOER. Third edition, 11 illus. viii + 75 pp. crown 8vo. (_1889_) 4 6

=Long Distance Electric Power Transmission.= By R. W. HUTCHINSON. 136 illus. 345 pp. crown 8vo. (_New York, 1907_) _net_ 12 6

=Theory and Practice of Electric Wiring.= By W. S. IBBETSON. 119 ill. 366 pp. cr. 8vo. (_1909_) _net_ 5 0

=Practical Electrical Engineering for Elementary Students.= By W. S. IBBETSON. 61 illus. 155 pp. crown 8vo. (_1910_) _net_ 3 6

=Form of Model General Conditions= recommended by THE INSTITUTION OF ELECTRICAL ENGINEERS for use in connection with Electrical Contracts. _New edition in preparation._

=Telegraphy for Beginners.= By W. H. JONES. 19 illus. 58 pp. crown 8vo. (_New York, 1910_) _net_ 2 0

=A Handbook of Electrical Testing.= By H. R. KEMPE. Seventh edition, 285 illus. 706 pp. demy 8vo. (_1908_) _net_ 18 0

=Electromagnets=, their design and construction. By A. N. MANSFIELD. 36 illus. 155 pp. 18mo, boards. (_New York, 1901_) _net_ 2 0

=Telephone Construction, Methods and Cost.= By C. MAYER. With Appendices on the cost of materials and labour by J. C. SLIPPY. 103 illus. 284 pp. crown 8vo. (_New York, 1908_) _net_ 12 6

=Storage Batteries, Stationary and Portable.= By J. P. NIBLETT. 22 illus. 80 pp. crown 8vo. (_New York, 1911_) _net_ 2 6

=House Wiring.= By T. W. POPPE. 73 illus. 103 pp. 12mo, limp. (_New York, 1912_) _net_ 3 0

=Practical Electrics=: a Universal Handybook on Every Day Electrical Matters. Seventh edition, 126 illus. 135 pp. 8vo. (S. & C. SERIES, No. 13.) (_New York, 1902_) _net_ 1 6

=Electroplating.= By H. C. REETZ. 62 illus. 99 pp. crown 8vo. (NEW YORK, 1911) _net_ 2 0

=Wiring Houses for the Electric Light.= By N. H. SCHNEIDER. 40 illus. 85 pp. crown 8vo. (S. & C. SERIES, No. 25.) (_New York, 1911_) _net_ 1 6

=Induction Coils.= By N. H. SCHNEIDER. Second edition, 79 illus. 285 pp. crown 8vo. (_New York, 1901_) _net_ 4 6

=Electric Gas Lighting.= By N. H. SCHNEIDER. 57 illus. 101 pp. cr. 8vo. (S. & C. SERIES, No. 8). (_New York, 1901_) _net_ 1 6

=How to Install Electric Bells, Annunciators and Alarms.= By N. H. SCHNEIDER. 59 illus. 63 pp. crown 8vo, limp. (S. & C. SERIES, No. 2.) (_New York, 1905_) _net_ 1 6

=Modern Primary Batteries=, their construction, use and maintenance. By N. H. SCHNEIDER. 54 illus. 94 pp. crown 8vo. (S. & C. SERIES, No. 1.) (_New York, 1905_) _net_ 1 6

=Practical Engineers' Handbook on the Care and Management of Electric Power Plants.= By N. H. SCHNEIDER. 203 illus. 274 pp. crown 8vo. (_New York, 1906_) _net_ 5 0

=Electrical Circuits and Diagrams=, illustrated and explained. By N. H. SCHNEIDER. 8vo. (S. & C. SERIES, NOS. 3 AND 4.) (_New York_) No. 3, Part 1. _New edition in preparation._ No. 4, Part 2. 73 pp. (_1909_) _net_ 1 6

=Electrical Instruments and Testing.= By N. H. SCHNEIDER. Third edition. 133 illus. 239 pp. crown 8vo. (_New York, 1907_) _net_ 4 6

=Experimenting with Induction Coils.= By N. H. SCHNEIDER. 26 illus. 73 pp. crown 8vo. (S. & C. SERIES, No. 5.) (_New York, 1906_) _net_ 1 6

=Study of Electricity for Beginners.= By N. H. SCHNEIDER. 54 illus. 88 pp. crown 8vo. (S. & C. SERIES, No. 6.) (_New York, 1905_) _net_ 1 6

=Wiring Houses for the Electric Light=: Low Voltage Battery Systems. 44 illus. 86 pp. crown 8vo. (S. & C. SERIES, No. 25.) (_New York, 1911_) _net_ 1 6

=Low Voltage Electric Lighting with the Storage Battery.= By N. H. SCHNEIDER. 23 illus. 85 pp. crown 8vo. (S. & C. SERIES, No. 26.) (_New York, 1911_) _net_ 1 6

=Dry Batteries=: how to Make and Use them. By a DRY BATTERY EXPERT. With additional notes by N. H. SCHNEIDER. 30 illus. 59 pp. crown 8vo. (S. & C. SERIES, No. 7.) (_New York, 1905_) _net_ 1 6

=The Diseases of Electrical Machinery.= By E. SCHULZ. Edited, with a Preface, by Prof. S. P. THOMPSON. 42 illus. 84 pp. crown 8vo _net_ 2 0

=Electricity Simplified.= By T. O. SLOANE. Tenth edition, 29 illus. 158 pp. crown 8vo. (_New York, 1901_) _net_ 4 6

=How to become a Successful Electrician.= By T. O. SLOANE. Third edition, 4 illus. 202 pp. crown 8vo. (_New York, 1899_) _net_ 4 6

=Electricity=: its Theory, Sources and Applications. By J. T. SPRAGUE. Third edition, 109 illus. 658 pp. crown 8vo (_1892_) _net_ 7 6

=Telegraphic Connections.= By C. THOM and W. H. JONES. 20 plates, 59 pp. oblong 8vo. (_New York, 1892_) _net_ 3 6

=Dynamo Electric Machinery.= By Prof. S. P. THOMPSON. Seventh edition, demy 8vo. (FINSBURY TECHNICAL MANUAL.) Vol. I. =Continuous-Current Machinery.= With 4 coloured and 30 folding plates, 573 illus. 984 pp. (_1904_) _net_ 1 10 0 Vol. II. =Alternating Current Machinery.= 15 coloured and 24 folding plates, 546 illus. 900 pp. (_1905_) _net_ 1 10 0

=Design of Dynamos= (Continuous Currents). By Prof. S. P. THOMPSON. 4 coloured and 8 folding plates, 243 pp. demy 8vo. (_1903_) _net_ 12 0

=Schedule for Dynamo Design=, issued with the above. 6_d._ each, 4_s._ per doz., or 18_s._ per 100 _net_

=Curves of Magnetic Data for Various Materials.= A reprint on transparent paper for office use of Plate I from Dynamo Electric Machinery, and measuring 25 in. by 16 in. _net_ 0 7

=The Electromagnet.= By C. R. UNDERHILL. 67 illus. 159 pp. crown 8vo. (_New York, 1903_) _net_ 6 6

=Practical Guide to the Testing of Insulated Wires and Cables.= By H. L. WEBB. Fifth edition, 38 illus. 118 pp. crown 8vo. (_New York, 1902_) _net_ 4 6

=Wiring Rules.= With Extracts from the Board of Trade Regulations and the Home Office Regulations for Factories and Workshops. Issued by =The Institution of Electrical Engineers.= Sixth edition, 42 pp. 8vo, sewed. (_1911_) _net_ 0 6

FOREIGN EXCHANGE.

=English Prices with Russian Equivalents= (at Fourteen Rates of Exchange). English prices per lb., with equivalents in roubles and kopecks per pood. By A. ADIASSEWICH. 182 pp. fcap. 32mo, roan. (_1908_) _net_ 1 0

=English Prices with German Equivalents= (at Seven Rates of Exchange). English prices per lb., with equivalents in marks per kilogramme. By ST. KOCZOROWSKI. 95 pp. fcap. 32mo, roan. (_1909_) _net_ 1 0

=English Prices with Spanish Equivalents.= At Seven Rates of Exchange. English prices per lb., with equivalents in pesetas per kilogramme. By S. LAMBERT. 95 pp. 32mo, roan. (_1910_) _net_ 1 0

=English Prices with French Equivalents= (at Seven Rates of Exchange). English prices per lb. to francs per kilogramme. By H. P. MCCARTNEY. 97 pp. 32mo, roan. (_1907_) _net_ 1 0

=Principles of Foreign Exchange.= By E. MATHESON. Fourth edition, 54 pp. 8vo, sewed. (_1905_) _net_ 0 3

GAS AND OIL ENGINES.

=The Theory of the Gas Engine.= By D. CLERK. Edited by F. E. IDELL. Third edition, 19 illus. 180 pp. 18mo, boards. (_New York, 1903_) _net_ 2 0

=Electrical Ignition for Internal Combustion Engines.= By M. A. CODD. 109 illus. 163 pp. crown 8vo. (_1911_) _net_ 3 0

=The Design and Construction of Oil Engines.= By A. H. GOLDINGHAM. Third edition, 112 illus. 260 pp. crown 8vo. (_New York, 1910_) _net_ 10 6

=Gas Engine in Principle and Practice.= By A. H. GOLDINGHAM. New Impression. 107 illus. 195 pp. 8vo. (_New York, 1912_) _net_ 6 6

=Practical Hand-Book on the Care and Management of Gas Engines.= By G. LIECKFELD. Third edition, square 16mo. (_New York, 1896_) 3 6

=Elements of Gas Engine Design.= By S. A. MOSS. 197 pp. 18mo, boards. (_New York, 1907_) _net_ 2 0

=Gas and Petroleum Engines.= A Manual for Students and Engineers. By Prof. W. ROBINSON. (FINSBURY TECHNICAL MANUAL.) _Third edition in preparation_

GAS LIGHTING.

=Gas Analyst's Manual= (incorporating Hartley's "Gas Analyst's Manual" and "Gas Measurement"). By J. ABADY. 102 illus. 576 pp. demy 8vo. (_1902_) _net_ 18 0

=Gas Works=: their Arrangement, Construction, Plant and Machinery. By F. COLYER. 31 folding plates, 134 pp. 8vo. (_1884_) _net_ 8 6

=Transactions of the Institution of Gas Engineers.= Edited by WALTER T. DUNN, _Secretary_. Published annually. 8vo _net_ 10 6

=Lighting by Acetylene.= By F. DYE. 75 illus. 200 pp. crown 8vo. (_1902_) _net_ 6 0

=A Comparison of the English and French Methods of Ascertaining the Illuminating Power of Coal Gas.= By A. J. VAN EIJNDHOVEN. Illustrated, crown 8vo. (_1897_) 4 0

=Gas Lighting and Gas Fitting.= By W. P. GERHARD. Second edition, 190 pp. 18mo, boards. (_New York, 1894_) _net_ 2 0

=A Treatise on the Comparative Commercial Values of Gas Coals and Cannels.= By D. A. GRAHAM. 3 plates, 100 pp. 8vo. (_1882_) 4 6

=The Gas Engineers Laboratory Handbook.= By J. HORNBY. Third edition, revised, 70 illus. 330 pp. crown 8vo. (_1911_) _net_ 6 0

HISTORICAL AND BIOGRAPHICAL.

=Extracts from the Private Letters of the late Sir William Fothergill Cooke=, 1836-9, relating to the Invention and Development of the Electric Telegraph; also a Memoir by LATIMER CLARK. Edited by F. H. WEBB, Sec. Inst. E.E. 8vo. (_1895_) 3 0

=A Chronology of Inland Navigation= in Great Britain. By H. R. DE SALIS. Crown 8vo. (_1897_) 4 6

=A History of Electric Telegraphy= to the year 1837. By J. J. FAHIE. 35 illus. 542 pp. crown 8vo. (_1889_) 2 0

=History and Development of Steam Locomotion on Common Roads.= By W. FLETCHER. 109 illus. 288 pp. 8vo. 5 0

=Life as an Engineer=: its Lights, Shades, and Prospects. By J. W. C. HALDANE. New edition, 23 plates, 390 pp. crown 8vo. (_1910_) _net_ 5 0

=Philipp Reis=, Inventor of the Telephone: a Biographical Sketch. By Prof. S. P. THOMPSON. 8vo, cloth. (_1883_) 7 6

=The Development of the Mercurial Air Pump.= By Prof. S. P. THOMPSON. Illustrated, royal 8vo, sewed. (_1888_) 1 6

HOROLOGY.

=Watch and Clock Maker's Handbook=, Dictionary and Guide. By F. J. BRITTEN. Tenth edition, 450 illus. 492 pp. crown 8vo. (_1902_) _net_ 5 0

=The Springing and Adjusting of Watches.= By F. J. BRITTEN. 75 illus. 152 pp. crown 8vo. (_1898_) _net_ 3 0

=Prize Essay on the Balance Spring= and its Isochronal Adjustments. By M. IMMISCH. 7 illus. 50 pp. crown 8vo. (_1872_) 2 6

HYDRAULICS AND HYDRAULIC MACHINERY.

(_See also_ IRRIGATION _and_ WATER SUPPLY.)

=The Suction Caused by Ships= explained in popular language. By E. S. BELLASIS. 2 plates, 26 pp. 8vo, sewed. (_1912_) _net_ 1 0

=Hydraulics with Working Tables.= By E. S. BELLASIS. Second edition, 160 illus. xii + 311 pp. 8vo. (_1911_) _net_ 12 0

=Pumps=: Historically, Theoretically and Practically Considered. By P. R. BJÖRLING. Second edition, 156 illus. 234 pp. crown 8vo. (_1895_) 7 6

=Pump Details.= By P. R. BJÖRLING. 278 illus. 211 pp. crown 8vo. (_1892_) 7 6

=Pumps and Pump Motors=: A Manual for the use of Hydraulic Engineers. By P. R. BJÖRLING. Two vols. 261 plates, 369 pp. royal 4to. (_1895_) _net_ 1 10 0

=Practical Handbook on Pump Construction.= By P. R. BJÖRLING. Second edition, 9 plates, 90 pp. crown 8vo. (_1904_) 5 0

=Water or Hydraulic Motors.= By P. R. BJÖRLING. 206 illus. 287 pp. crown 8vo. (_1903_) 9 0

=Hydraulic Machinery=, with an Introduction to Hydraulics. By R. G. BLAINE. Second edition, with 307 illus. 468 pp. 8vo. (FINSBURY TECHNICAL MANUAL.) (_1905_) _net_ 14 0

=Practical Hydraulics.= By T. BOX. Fifteenth edition, 8 plates, 88 pp. crown 8vo. (_1909_) _net_ 5 0

=Pumping and Water Power.= By F. A. BRADLEY. 51 illus., vii + 118 pp. demy 8vo. (_1912_) _net_ 4 6

=Hydraulic, Steam, and Hand Power Lifting and Pressing Machinery.= By F. COLYER. Second edition, 88 plates, 211 pp. imperial 8vo. (_1892_) _net_ 10 6

=Pumps and Pumping Machinery.= By F. COLYER. Vol. I. Second edition, 53 plates, 212 pp. 8vo (_1892_) _net_ 10 6 Vol. II. Second edition, 48 plates, 169 pp. 8vo. (_1900_) _net_ 10 6

=Construction of Horizontal and Vertical Waterwheels.= By W. CULLEN. Second edition, small 4to. (_1871_) 5 0

=Donaldson's Poncelet Turbine= and Water Pressure Engine and Pump. By W. DONALDSON. 2 plates, viii + 32 pp. demy 4to. (_1883_) 5 0

=Principles of Construction and Efficiency of Waterwheels.= By W. DONALDSON. 13 illus. 94 pp. 8vo. (_1876_) 5 0

=Practical Hydrostatics and Hydrostatic Formulæ.= By E. S. GOULD. 27 illus. 114 pp. 18mo, boards. (_New York, 1903_) _net_ 2 0

=Hydraulic and other Tables= for purposes of Sewerage and Water Supply. By T. HENNELL. Third edition, 70 pp. crown 8vo. (_1908_) _net_ 4 6

=Tables for Calculating the Discharge of Water= in Pipes for Water and Power Supplies. Indexed at side for ready reference. By A. E. SILK. 63 pp. crown 8vo. (_1899_) 5 0

=Simple Hydraulic Formulæ.= By T. W. STONE. 9 plates, 98 pp. crown 8vo. (_1881_) 4 0

=A B C of Hydrodynamics.= By LT.-COL. R. DE VILLAMIL, R.E. (retd.). 48 illus. xi + 135 pp. demy 8vo. (_1912_) _net_ 6 0

INDUSTRIAL CHEMISTRY AND MANUFACTURES.

=Perfumes and their Preparation.= By G. W. ASKINSON. Translated from the Third German Edition by I. FUEST. Third edition, 32 illus. 312 pp. 8vo. (_New York, 1907_) _net_ 12 6

=Brewing Calculations=, Gauging and Tabulation. By C. H. BATER. 340 pp. 64mo, roan, gilt edges. (_1897_) _net_ 1 6

=A Pocket Book for Chemists=, Chemical Manufacturers, Metallurgists, Dyers, Distillers, etc. By T. BAYLEY. Seventh edition, new impression, 550 pp. royal 32mo, roan, gilt edges. (_1912_) _net_ 5 0

=Practical Receipts= for the Manufacturer, the Mechanic, and for Home use. By Dr. H. R. BERKELEY and W. M. WALKER. New impression, 250 pp. demy 8vo. (_1912_) _net_ 5 0

=A Treatise on the Manufacture of Soap and Candles=, Lubricants and Glycerine. By W. L. CARPENTER and H. LEASK. Second edition, 104 illus. 456 pp. crown 8vo. (_1895_) 12 6

=A Text Book of Paper Making.= By C. F. CROSS and E. J. BEVAN. Third edition, 97 illus. 411 pp. crown 8vo. (_1907_) _net_ 12 6

=C.B.S. Standard Units and Standard Paper Tests.= By C. F. CROSS, E. J. BEVAN, C. BEADLE and R. W. SINDALL. 25 pp. crown 4to. (_1903_) _net_ 2 6

=Pyrometry.= By C. R. DARLING. 60 illus. 200 pp. crown 8vo. (_1911_) _net_ 5 0

=Soda Fountain Requisites.= A Practical Receipt Book for Druggists, Chemists, etc. By G. H. DUBELLE. Third edition, 157 pp. crown 8vo. (_New York, 1905_) _net_ 4 6

=Spices and How to Know Them.= By W. M. GIBBS. 47 plates, including 14 in colours, 176 pp. 8vo. (_New York, 1909_) _net_ 15 0

=The Chemistry of Fire= and Fire Prevention. By H. and H. INGLE. 45 illus. 290 pp. crown 8vo. (_1900_) 9 0

=Ice-Making Machines.= By M. LEDOUX and others. Sixth edition, 190 pp. 18mo, boards. (_New York, 1906_) _net_ 2 0

=Brewing with Raw Grain.= By T. W. LOVIBOND. 75 pp. crown 8vo. (_1883_) 5 0

=The Chemistry, Properties, and Tests of Precious Stones.= By J. Mastin. 114 pp. fcap. 16mo, limp leather, gilt top. (_1911_) _net_ 2 6

=Sugar, a Handbook for Planters and Refiners.= By the late J. A. R. NEWLANDS and B. E. R. NEWLANDS. 236 illus. 876 pp. 8vo. (_1909_) _net_ 1 5 0

=Principles of Leather Manufacture.= By Prof. H. R. PROCTER. 101 illus. 520 pp. medium 8vo. (_1908_) _net_ 18 0

=Leather Industries Laboratory Handbook= of Analytical and Experimental methods. By H. R. PROCTER. Second edition, 4 plates, 46 illus. 450 pp. demy 8vo. (_1908_) _net_ 18 0

=Leather Chemists' Pocket Book.= A short compendium of Analytical Methods. By Prof. H. R. PROCTER. Assisted by Dr. E. STIASNY and H. BRUMWELL. (_In the Press_.)

=Theoretical and Practical Ammonia Refrigeration.= By I. I. REDWOOD. Sixth thousand, 15 illus. 146 pp. square 16mo. (_New York, 1909_) _net_ 4 6

=Breweries and Maltings.= By G. SCAMMELL and F. COLYER. Second edition, 20 plates, 178 pp. 8vo. (_1880_) _net_ 6 0

=Factory Glazes for Ceramic Engineers.= By H. RUM-BELLOW. Folio. Series A, Leadless Sanitary Glazes. (_1908_) _net_ 2 2 0

=Spons' Encyclopædia of the Industrial Arts=, Manufactures and Commercial Products. 1500 illus. 2100 pp. super-royal 8vo. (_1882_) In 2 Vols, cloth _net_ 2 2 0

=The Absorption Refrigerating Machine.= By G. T. VOORHEES. 42 illus. 144 pp. narrow crown 8vo. (_New York, 1911_) _net_ 8 6

=Tables for the Quantitative Estimation of the Sugars.= By E. WEIN and W. FREW. Crown 8vo. (_1896_) 6 0

=The Puering, Bating and Drenching of Skins.= By J. T. WOOD. 33 illus. xv + 300 pp. demy 8vo. (_1912_) _net_ 12 6

=Workshop Receipts.= For the use of Manufacturers, Mechanics and Scientific Amateurs. NEW AND THOROUGHLY REVISED EDITION, crown 8vo. (_1909_) _each net_ 3 0 Vol. I. ACETYLENE LIGHTING _to_ DRYING. 223 illus. 532 pp. Vol. II. DYEING _to_ JAPANNING. 259 illus. 540 pp. Vol. III. JOINTING PIPES _to_ PUMPS. 256 illus. 528 pp. Vol. IV. RAINWATER SEPARATORS _to_ WIRE ROPE, SPLICING. 321 illus. 540 pp.

=Practical Handbook on the Distillation of Alcohol from Farm Products.= By F. B. WRIGHT. Second edition, 60 illus. 271 pp. crown 8vo. (_New York, 1907_) _net_ 4 6

=The Manufacture of Chocolate= and other Cacao Preparations. By P. ZIPPERER. Second edition, 87 illus. 280 pp. royal 8vo. (_1902_) _net_ 16 0

INTEREST TABLES.

=The Wide Range Dividend and Interest Calculator=, showing at a glance the Percentage on any sum from One Pound to Ten Thousand Pounds, at any Interest, from 1% to 12-1/2%, proceeding by 1/4%. By A. STEVENS. 100 pp. super royal 8vo, cloth _net_ 6 0 Quarter morocco, cloth sides _net_ 7 6

=The Wide Range Income Tax Calculator=, showing at a glance the Tax on any sum from One Shilling to Thousand Pounds, at the Rate of 9_d._, 1/- and 1/2 in the Pound. By A. STEVENS. On folding card, imperial 8vo _net_ 1 0

IRRIGATION.

=Punjab Rivers and Works.= By E. S. BELLASIS. 47 illus. 65 pp. folio, cloth. (_1911_) _net_ 8 0

=Irrigation Pocket Book.= By R. B. BUCKLEY. 419 pp. crown 8vo, leather cloth with rounded corners. (_1911_) _net_ 12 6

=The Design of Channels for Irrigation and Drainage.= By R. B. BUCKLEY. 22 diagrams, 56 pp. crown 8vo. (_1911_) _net_ 2 0

=The Irrigation Works of India.= By R. B. BUCKLEY. Second edition, with coloured maps and plans. 336 pp. 4to, cloth. (_1905_) _net_ 2 2 0

=Irrigated India.= By Hon. ALFRED DEAKIN. With Map, 322 pp. 8vo. (_1893_) 8 6

=Indian Storage Reservoirs=, with Earthen Dams. By W. L. STRANGE. _Second edition in preparation_

=The Irrigation of Mesopotamia.= By Sir W. WILLCOCKS. 2 vols. 46 plates, 136 pp. (Text super-royal 8vo, plates folio). (_1911_) _net_ 1 0 0

=Egyptian Irrigation.= By Sir W. WILLCOCKS. _Third edition in preparation._ _A few copies of the First Edition (1889) are still to be had. Price_ 15_s. net._

=The Nile Reservoir Dam at Assuan=, and After. By Sir W. WILLCOCKS. Second edition, 13 plates, super-royal 8vo. (_1903_) _net_ 6 0

=The Assuân Reservoir and Lake Moeris.= By Sir W. WILLCOCKS. With text in English, French and Arabic. 5 plates, 116 pp. super-royal 8vo. (_1904_) _net_ 5 0

=The Nile in 1904.= By Sir W. WILLCOCKS. 30 plates, 200 pp. super-royal 8vo. (_1904_) _net_ 9 0

LOGARITHM TABLES.

=Aldum's Pocket Folding Mathematical Tables.= Four-figure logarithms, and Anti-logarithms, Natural Sines, Tangents, Cotangents, Cosines, Chords and Radians for all angles from 1 to 90 degrees. And Decimaliser Table for Weights and Money. On folding card. _Net_ 4_d._ 20 copies, _net_ 6_s._

=Tables of Seven-figure Logarithms= of the Natural Numbers from 1 to 108,000. By C. BABBAGE. Stereotype edition, 8vo _net_ 5 0

=Four-Place Tables of Logarithms and Trigonometric Functions.= By E. V. HUNTINGTON. Ninth thousand, 34 pp. square 8vo, limp buckram, with cut lateral index. (_New York, 1911_) _net_ 3 0

=Short Logarithmic= and other Tables. By W. C. UNWIN. Fourth edition, small 4to 3 0

=Logarithmic Land Measurement.= By J. WALLACE. 32 pp. royal 8vo. (_1910_) _net_ 5 0

=A B C Five-figure Logarithms with Tables, for Chemists.= By C. J. WOODWARD. Crown 8vo _net_ 2 6

=A B C Five-figure Logarithms= for general use, with lateral index for ready reference. By C. J. WOODWARD. Second edition, with cut lateral Index, 116 pp. 12mo, limp leather _net_ 3 0

MARINE ENGINEERING AND NAVAL ARCHITECTURE.

=Marine Propellers.= By S. W. BARNABY. Fifth edition, 5 plates, 56 illus. 185 pp. demy 8vo. (_1908_) _net_ 10 6

=Marine Engineer's Record Book=: Engines. By B. C. BARTLEY. 8vo, roan _net_ 5 0

=The Suction Caused by Ships and the Olympic-Hawke Collision.= By E. S. BELLASIS. 1 chart and 5 illus. in text, 26 pp. 8vo, sewed. (_1912_) _net_ 1 0

=Yachting Hints=, Tables and Memoranda. By A. C. FRANKLIN. Waistcoat pocket size, 103 pp. 64mo, roan, gilt edges _net_ 1 0

=Steamship Coefficients, Speeds and Powers.= By C. F. A. FYFE. 31 plates, 280 pp. fcap. 8vo, leather. (_1907_) _net_ 10 6

=Steamships and Their Machinery=, from first to last. By J. W. C. HALDANE. 120 illus. 532 pp. 8vo. (_1893_) 15 0

=Tables for Constructing Ships' Lines.= By A. HOGG. Third edition, 3 plates, 20 pp. 8vo, sewed (_1911_) _net_ 3 0

=Submarine Boats.= By G. W. HOVGAARD. 2 plates, 98 pp. crown 8vo. (_1887_) 5 0

=Tabulated Weights= of Angle, Tee, Bulb, Round, Square, and Flat Iron and Steel for the use of Naval Architects, Ship-builders, etc. By C. H. JORDAN. Sixth edition, 640 pp. royal 32mo, French morocco, gilt edges. (_1909_) _net_ 7 6

=Particulars of Dry Docks=, Wet Docks, Wharves, etc. on the River Thames. Compiled by C. H. JORDAN. Second edition, 7 coloured charts, 103 pp. oblong 8vo. (_1904_) _net_ 2 6

=Marine Transport of Petroleum.= By H. LITTLE. 66 illus. 263 pp. crown 8vo. (_1890_) 10 6

=Questions and Answers for Marine Engineers=, with a Practical Treatise on Breakdowns at Sea. By T. LUCAS. 12 folding plates, 515 pp. gilt edges, crown 8vo. (_New York, 1902_) _net_ 8 0

=Reed's Engineers' Handbook to the Board of Trade Examinations= for certificates of Competency as First and Second Class Engineers. Nineteenth edition, 37 plates, 358 illus. 696 pp. 8vo _net_ 14 0

=Key to Reed's Handbook= _net_ 7 6

=Reed's Marine Boilers.= Second edition, crown 8vo _net_ 4 6

=Reed's Useful Hints to Sea-going Engineers.= Fourth edition, 8 plates, 50 illus. 312 pp. crown 8vo. (_1903_) _net_ 3 6

MATERIALS.

=Practical Treatise on the Strength of Materials.= By T. BOX. Fourth edition, 27 plates, 536 pp. 8vo. (_1902_) _net_ 12 6

=Treatise on the Origin, Progress, Prevention and Cure of Dry Rot in Timber.= By T. A. BRITTON. 10 plates, 519 pp. crown 8vo. (_1875_) 7 6

=Solid Bitumens.= By S. F. PECKHAM. 23 illus. 324 pp. 8vo. (_New York, 1909_) _net_ 1 1 0

=Lubricants, Oils and Greases.= By I. I. REDWOOD. 3 plates, ix + 54 pp. 8vo. (_1898_) _net_ 6 6

=Practical Treatise on Mineral Oils= and their By-Products. By I. I. REDWOOD. 67 illus. 336 pp. demy 8vo. (_1897_) 15 0

=Silico-Calcareous Sandstones=, or Building Stones from Quartz, Sand and Lime. By E. STOFFLER. 5 plates, 8vo, sewed. (_1901_) _net_ 4 0

=Proceedings of the Fifth Congress, International Association for Testing Materials.= English edition. 189 illus. 549 pp. demy 8vo. (_1910_). Paper _net_ 15 0 Cloth _net_ 18 0

MATHEMATICS.

=Imaginary Quantities.= By M. ARGAND. Translated by PROF. HARDY. 18mo, boards. (_New York_) _net_ 2 0

=Text Book of Practical Solid Geometry.= By E. H. DE V. ATKINSON. Revised by MAJOR B. R. WARD, R.E. Second edition, 17 plates, 8vo. (_1901_) 7 6

=Quick and Easy Methods of Calculating=, and the Theory and Use of the Slide Rule. By R. G. BLAINE. Fourth edition, 6 illus. xii + 152 pp. 16mo, leather cloth. (_1912_) _net_ 2 6

=Symbolic Algebra=, or the Algebra of Algebraic Numbers. By W. CAIN. 18mo, boards. (_New York_) _net_ 2 0

=Nautical Astronomy.= By J. H. COLVIN. 127 pp. crown 8vo. (_1901_) _net_ 2 6

=Chemical Problems.= By J. C. FOYE. Fourth edition, 141 pp. 18mo, boards. (_New York, 1898_) _net_ 2 0

=Primer of the Calculus.= By E. S. GOULD. Second edition, 24 illus. 122 pp. 18mo, boards. (_New York, 1899_) _net_ 2 0

=Elementary Treatise on the Calculus= for Engineering Students. By J. GRAHAM. Third edition, 276 pp. crown 8vo. (FINSBURY TECHNICAL MANUAL.) (_1905_) 7 6

=Manual of the Slide Rule.= By F. A. HALSEY. Second edition, 31 illus. 84 pp. 18mo, boards. (_New York, 1901_) _net_ 2 0

=Reform in Chemical and Physical Calculations.= By C. J. T. HANSSEN. 4to. (_1897_) _net_ 6 6

=Algebra Self-Taught.= By P. HIGGS. Third edition, 104 pp. crown 8vo. (_1903_) 2 6

=A Text-book on Graphic Statics.= By C. W. MALCOLM. 155 illus. 316 pp. 8vo. (_New York, 1909_) _net_ 12 6

=Galvanic Circuit investigated Mathematically.= By G. S. OHM. Translated by WILLIAM FRANCIS. 269 pp. 18mo, boards. (_New York, 1891_) _net_ 2 0

=Elementary Practical Mathematics.= By M. T. ORMSBY. Second edition, 128 illus. xii + 410 pp. medium 8vo. (_1911_) _net_ 5 0

=Elements of Graphic Statics.= By K. VON OTT. Translated by G. S. CLARKE. 93 illus. 128 pp. crown 8vo. (_1901_) 5 0

=Figure of the Earth.= By F. C. ROBERTS. 18mo, boards. (_New York_) _net_ 2 0

=Arithmetic of Electricity.= By T. O'C. SLOANE. Thirteenth edition, 5 illus. 162 pp. crown 8vo. (_New York, 1901_) _net_ 4 6

=Graphic Method for Solving certain Questions in Arithmetic or Algebra.= By G. L. VOSE. Second edition with 28 illus. 62 pp. 18mo, boards. (_New York, 1902_) _net_ 2 0

=Problems in Electricity.= A Graduated Collection comprising all branches of Electrical Science. By R. WEBER. Translated from the French by E. A. O'KEEFE. 34 illus. 366 pp. crown 8vo. (_1902_) _net_ 7 6

MECHANICAL ENGINEERING.

STEAM ENGINES AND BOILERS, ETC.

=Engineers' Sketch Book of Mechanical Movements.= By T. W. BARBER. Fifth edition, 3000 illus. 355 pp. 8vo. (_1906_) _net_ 10 6

=The Repair and Maintenance of Machinery.= By T. W. BARBER. 417 illus. 476 pp. 8vo. (_1895_) 10 6

=Practical Treatise on Mill Gearing.= By T. BOX. Fifth edition, 11 plates, 128 pp. crown 8vo. (_1892_) 7 6

=The Mechanical Engineers' Price Book, 1912.= Edited by G. BROOKS. 176 pp. pocket size (6-1/2 in. by 3-3/4 in. by 1/2 in. thick), leather cloth, with rounded corners. (_1912_) _net_ 4 0

=Safety Valves.= By R. H. BUELL. Third edition, 20 illus. 100 pp. 18mo, boards. (_New York, 1898_) _net_ 2 0

=Machine Design.= By Prof. W. L. CATHCART.