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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.



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-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.


COMPRESSED AIR IN ALL ITS APPLICATIONS By 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,



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 wod 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 CONCRETE 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 Concrcre Work.



STANDARD 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 conveniet t. 682 pages-393 illustrations.



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.


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, suhpresses, 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.



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 them.selves, 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.


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, 9x12 inches,

50 cents


ARITHMETIC OF ELECTRICITY. By Prof. T. O'CONOR SLOANE. A practical treatise on electrical calculations of all kinds reduced to a series of rules, all of the sinplest forms, and involving only ordinary arithmetic; each rule illustrated by one or more practical problems, with aetailed solution of each one. This book is classed among the most useful works published on the science of electricity covering as it does the mathematics of electricity in a mariner that will attract the attention of those who are not familiar with algebraical formulas. '160 pages.


COMMUTATOR CONSTRUCTION. By WM. BAXTER, JR. The business end of any dynamo or motor of the direct current type is the commutator. This book goes into the designing, building, and maintenance of commutators, shows how to locate troubles and how to remedy them; everyone who fusses with dynamos needs this.

25 cents

DYNAMO BUILDING FOR AMATEURS, OR HOW TO CONSTRUCT A FIFTY WATT DYNAMO. By ARTHUR 1. WEED, Member of N. Y. Electrical Society. This book is a practical treatise showing in detail the construction of a small dynamo or motor, the entire machine work of which can be done on a small foot lathe.

Dimensioned working drawings are given for each piece of machine work and each operation is clearly described.

This machine when used as a dynamo has an output of fifty watts; when used as a motor it will drive a small drill press or lathe. It can be used to drive a sewing machine on any and all ordinary work.

The book is illustrated with more than sixty original engravings showing the actual construction of the different parts. Paper.

Paper 50 cents Cloth $1.00

ELECTRIC FURNACES AND THEIR INDUSTRIAL APPLICATIONS. By J. WRIGHT. This is a book which will prove of interest to many classes of people; the manufacturer who desires to know what product can be manufactured successfully in the electric furnace, the chemist who wishes to post himself on the electro-chemistry, and the student of science who merely looks into the subject from curiosity. 288 pages.


ELECTRIC LIGHTING AND HEATING POCKET BOOK. By SYDNEY F. WALKER. This book puts in convenient form useful information regarding the apparatus which is likely to be attached to the mains of an electrical company. Tables of units and equivalents are included and useful electrical laws and formulas are stated. 438 pages, 300 engravings. $3.00

ELECTRIC TOY MAKING, DYNAMO BUILDING, AND ELECTRIC MOTOR CONSTRUCTION. This work treats of the making at home of electrical toys, electrical apparatus, motors, dynamos, and instruments in general, and is designed to bring within the reach of young and old the manufacture of genuine and useful electrical appliances. 185 pages. Fully illustrater,


ELECTRIC WIRING, DIAGRAMS AND SWITCHBOARDS. By NEWTON HARRISON. This is the only complete work issued showing and telling you what you should know about direct and alternating current wiring. It is a ready reference. The work is free from advanced technicalities and mathematics. Arithmetic being used throughout. It is in every respect a handy, well-written, instructive, comprehensive volume on wiring for the wireman, foreman, contractor or electrician. 272 pages, 105 illustrations.


ELECTRICIAN'S HANDY BOOK. By Prof. T. O'CONOR SLOANE. This work is intended for the practical electrician, who has to make things go. The entire field of Electricity is covered within its pages. It contains no useless theory; everything is to the point. It teaches you just what you should know about electricity. It is the standard work published on the subject. Forty-one chapters, 610 engravings, handsomely bound in red leather with titles and edges in gold.


ELECTRICITY IN FACTORIES AND WORKSHOPS, ITS COST AND CONVENIENCE. By ARTHUR P. HASLAM. A practical book for power producers and power users showing what a convenience the electric motor, in its various forms, has become to the modern manufacturer. It also deals with the conditions which determine the cost of electric driving, and compares this with other methods of producing and utilizing power. 312 pages. Very fully illustrated.


ELECTRICITY SIMPLIFIED. By PROF. T. O'CONOR SLOANE. The object of "Electricity Simplified" is to make the subject as plain as possible and to show what the modern conception of electricity is; to show how two plates of different metals immersed in acid can send a message around the globe; to explain how a bundle of copper wire rotated by a steam engine can be the agent in lighting our streets, to tell what the volt, ohm and ampere are, and what high and low tension mean; and to answer the questions that perpetually arise in the mind in this age of electricity. 172 pages. Illustrated.


HOW TO BECOME A SUCCESSFUL ELECTRICIAN. By PROF. T. O'CONOR SLOANE. An interesting book from cover to cover. Telling in simplest language the surest and easiest way to become a successful electrician. The studies to be followed, methods of work, field of operation and the requirements of the successful electrician are pointed out and fully explained. 202 pages. Illustrated.


MANAGEMENT OF DYNAMOS. By LUMMIS-PATERSON. A handbook of theory and practice. This work is arranged in three parts. The first part covers the elementary theory of the dynamo. The second part, the construction and action of the different classes of dynamos in common use are described; while the third part relates to such matters as affect the practical management and working of dynamos and motors. 292 pages, 117 illustrations.


STANDARD ELECTRICAL DICTIONARY. By Prof. T. O'CONOR SLOANE. A practical handbook 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. 682 pages, 393 illustrations. $3.00

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