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Any of these books will be sent prepaid to any part of

the world, on receipt of price.

REMIT by Draft, Postal Money Order, Express Money Order

or by Registered Mail.

BRAZING AND SOLDERING

BRAZING AND SOLDERING. By JAMES F. HOBART. The only book that shows you just how to handle any job of brazing or soldering that comes along; tells you what mixture to use, how to make a furnace if you need one. Full of kinks. 4th edition. 25 cents

CHARTS

BATTLESHIP CHART. An engraving which shows the details of a battleship as if the sides were of glass and you could see all the interior. The finest piece of work that has ever been done. So accurate that it is used at Annapolis for instruction purposes. Shows all details and gives correct name of every part. 28 x 42 inches-plate paper. 50 cents

BOX CAR CHART. A chart showing the anatomy of a box car, having every part of the car numbered and its proper name given in a reference list. 20 cents

GONDOLA CAR CHART.

A chart showing the anatomy of a gondola car, having every part of the car numbered and its proper reference name given in a reference list. 20 cents

PASSENGER CAR CHART. A chart showing the anatomy of a passenger car, having every part of the car numbered and its proper name given in a reference list. 20 cents

TRACTIVE POWER CHART. A chart whereby you can find the tractive power or drawbar pull of any locomotive, without making a figure. Shows what cylinders are equal, how driving wheels and steam pressure affect the power. What sized engine you need to exert a given drawbar pull or anything you desire in this line. 50 cents

WESTINGHOUSE AIR-BRAKE CHARTS. Chart I.Shows (in colors) the most modern Westinghouse High Speed and Signal Equipment used on Passenger Engines, Passenger Engine Tenders, and Passenger Cars. Chart II.-Shows (in colors) the Standard Westinghouse Equipment for Freight and Switch Engines, Freight and Switch Engine Tenders, and Freight Cars. Price for the set, 50 cents

CHEMISTRY

HENLEY'S TWENTIETH CENTURY BOOK OF RECEIPTS, FORMULAS AND PROCESSES. Edited by GARDNER D. HISCOX. The most valuable Techno-chemical Receipt Book published, including over 10,000 selected scientific chemical, technological, and practical receipts and processes. See page 24 for full description of this book.

CIVIL ENGINEERING

$3.00

HENLEY'S ENCYCLOPEDIA OF PRACTICAL ENGINEERING AND ALLIED TRADES. Edited by JOSEPH G. HORNER, A.M.I., M.E. This set of five volumes contains about 2,500 pages with thousands of illustrations, including diagrammatic and sectional drawings with full explanatory details. It covers the entire practice of Civil and Mechanical Engineering. It tells you all you want to know about engineering and tells it so simply, so clearly, so concisely that one cannot help but understand. $6.00 per volume or $25.00 for complete set of five volumes.

COKE

COKE-MODERN COKING PRACTICE; INCLUDING THE ANALYSIS OF MATERIALS AND PRODUCTS. By T. H. BYROM, Fellow of the Institute of Chemistry, Fellow of The Chemical Society, etc., and J. E. CHRISTOPHER, Member of the Society of Chemical Industry, etc. A handbook for those engaged in Coke manufacture and the recovery of Byproducts. Fully illustrated with folding plates.

The subject of Coke Manufacture is of rapidly increasing interest and significance, embracing as it does the recovery of valuable by-products in which scientific control is of the first importance. It has been the aim of the authors, in preparing this book, to produce one which shall be of use and benefit to those who are associated with, or interested in, the modern developments of the industry.

Contents: Chap. I. Introductory. Chap. II. General Classification of Fuels. Chap. III. Coal Washing. Chap. IV. The Sampling and Valuation of Coal, Coke, etc. Chap. V. The Calorific Power of Coal and Coke. Chap. VI. Coke Ovens. Chap. VII. Coke Ovens, continued. Chap. VIII. Coke Ovens, continued. Chap. IX. Charging and Discharging of Coke Ovens. Chap. X. Cooling and Condensing Plant. Chap. XI. Gas Exhausters. Chap. XII. Composition and Analysis of Ammoniacal Liquor. Chap. XIII. Working up of Ammoniacal Liquor. Chap. XIV. Treatment of Waste Gases from Sulphate Plants. Chap. XV. Valuation of Ammonium Sulphate. Chap. XVI. Direct Recovery of Ammonia from Coke Oven Gases. Chap. XVII. Surplus Gas from Coke Oven. Useful Tables. Very fully illustrated. $3.50 net

COMPRESSED AIR

By

COMPRESSED AIR IN ALL ITS APPLICATIONS GARDNER D. Hiscox. This is the most complete book on the subject of Air that has ever been issued, and its thirty-five chapters include about every phase of the subject one can think of. It may be called an encyclopedia of compressed air. It is written by an expert, who, in its 665 pages, has dealt with the subject in a comprehensive manner, no phase of it being omitted. Over 500 illustrations, 5th Edition, revised and enlarged. Cloth bound; $5.00, Half morocco,

$6.50

ORNAMENTAL CONCRETE WITHOUT MOLDS, By A. A. HOUGHTON. The process for making ornamental concrete without molds, has long been held as a secret and now, for the first time, this process is given to the public. The book reveals the secret and is the only book published which explains a simple, practical method whereby the concrete worker is enabled, by employing wood and metal templates of different designs, to mold or model in concrete any Cornice, Archivolt, Column, Pedestal, Base Cap, Urn or Pier in a monolithic form-right upon the job. These may be molded in units or blocks, and then built up to suit the specifications demanded. This work is fully illustrated, with detailed engravings.

$2.00

POPULAR HAND BOOK FOR CEMENT AND CON

CRETE USERS, By MYRON H. LEWIS, C.E. This is a concise treatise of the principles and methods employed in the manufacture and use of cement in all classes of modern works. The author has brought together in this work, all the salient matter of interest to the user of concrete and its many diversified products. The matter is presented in logical and systematic order, clearly written, fully illustrated and free from involved mathematics. Everything of value to the concrete user is given. Among the chapters contained in the book are: I. Historical Development of the Uses of Cement and Concrete. II. Glossary of Terms employed in Cement and Concrete work. III. Kinds of Cement employed in Construction. IV. Limes, Ordinary and Hydraulic. V. Lime Plasters. VI. Natural Cements. VII. Portland Cements. VIII. Inspection and Testing. IX. Adulteration; or Foreign Substances in Cement. X. Sand, Gravel and Broken Stone. XI. Mortar. XII. Grout. XIII. Concrete (Plain). XIV. Concrete (Reinforced). XV. Methods and Kinds of Reinforcements. XVI. Forms for Plain and Reinforced Concrete. XVII. Concrete Blocks. XVIII. Artificial Stone. XIX. Concrete Tiles. XX. Concrete Pipes and Conduits. XXI. Concrete Piles. XXII. Concrete Buildings. XXIII. Concrete in Water Works. XXIV. Concrete in Sewer Works. XXV. Concrete in Highway Construction. XXVI. Concrete Retaining Walls. XXVII. Concrete Arches and Abutments. XXVIII. Concrete in Subway and Tunnels. XXIX. Concrete in Bridge Work. XXX. Concrete in Docks and Wharves. XXXI. Concrete Construction under Water. XXXII. Concrete on the Farm. XXXIII. Concrete Chimneys. XXXIV. Concrete for Ornamentation. XXXV. Concrete Mausoleums and Miscellaneous Uses. XXXVI. Inspection for Concrete Work. XXXVII. Waterproofing Concrete Work. XXXVIII. Coloring and Painting Concrete Work. XXXIX. Method of Finishing Concrete Surfaces. XL. Specifications and Estimates for Concrete Work. $2.50

STANDARD

DICTIONARIES

ELECTRICAL

DICTIONARY. By T. O'CONOR SLOANE. An indispensable work to all interested in electrical science. Suitable alike for the student and professional. A practical hand-book of reference containing definitions of about 5,000 distinct words, terms and phrases. The definitions are terse and concise and include every term used in electrical science. Recently issued. An entirely new edition. Should be in the possession of all who desire to keep abreast with the progress of this branch of science. Complete, concise and convenient. 682 pages-393 illustrations.

$3.00

DIES-METAL WORK

DIES, THEIR CONSTRUCTION AND USE FOR THE MODERN WORKING OF SHEET METALS. By J. V. WOODWORTH. A new book by a practical man, for those who wish to know the latest practice in the working of sheet metals. It shows how dies are designed, made and used, and those who are engaged in this line of work can secure many valuable suggestions. $3.00

PUNCHES, DIES AND TOOLS FOR MANUFACTURING IN PRESSES. By J. V. Woodworth. An encyclopedia of die-making, punch-making, die-sinking, sheet-metal working, and making of special tools, subpresses, devices and mechanical combinations for punching, cutting, bending, forming, piercing, drawing, compressing, and assembling sheetmetal parts and also articles of other materials in machine tools. This is a distinct work from the author's book entitled "Dies; Their Construction and Use." 500 pages, 700 engravings. $4.00

DRAWING-SKETCHING PAPER

LINEAR PERSPECTIVE SELF-TAUGHT. By HERMAN T. C. KRAUS. This work gives the theory and practice of linear perspective, as used in architectural, engineering, and mechanical drawings. Persons taking up the study of the subject by themselves, without the aid of a teacher, will be able by the use of the instruction given to readily grasp the subject, and by reasonable practice become good perspective draftsmen. The arrangement of the book is good; the plate is on the left-hand, while the descriptive text follows on the opposite page, so as to be readily referred to. The drawings are on sufficiently large scale to show the work clearly and are plainly figured. The whole work makes a very complete course on perspective drawing, and will be found of great value to architects, civil and mechanical engineers, patent attorneys, art designers, engravers, and draftsmen. $2.50

PRACTICAL PERSPECTIVE. By RICHARDS and COLVIN. Shows just how to make all kinds of mechanical drawings in the only practical perspective isometric. Makes everything plain so that any mechanic can understand a sketch or drawing in this way. Saves time in the drawing room and mistakes in the shops. Contains practical examples of various classes of work. 50 cents

SELF-TAUGHT MECHANICAL DRAWING AND ELEMENTARY MACHINE DESIGN. By F. L. SYLVESTER, M.E., Draftsman, with additions by Erik Oberg, associate editor of "Machinery." A practical elementary treatise on Mechanical Drawing and Machine Design, comprising the first principles of geometric and mechanical drawing, workshop mathematics, mechanics, strength of materials and the calculation and design of machine details, compiled for the use of practical mechanics and young draftsmen. $2.00

A NEW SKETCHING PAPER. A new specially ruled paper to enable you to make sketches or drawings in isometric perspective without any figuring or fussing. It is being used for shop details as well as for assembly drawings, as it makes one sketch do the work of three, and no workman can help seeing just what is wanted. Pads of 40 sheets, 6 x 9 inches, 25 cents. Pads of 40 sheets, 9 x 12 inches, 50 cents

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