showing its working parts and the method of operation.

From the multitude of devices described, and illustrated, might be mentioned, in passing, such items as conveyors and elevators, Prony brakes, thermometers, various types of boilers, solar engines, oil-fuel burners, condensers, evaporators, Corliss and other valve gears, governors, gas engines, water motors of various descriptions, air ships, motors and dynamos, automobile and motor bicycles, railway block signals, car couplers, link and gear motions, ball bearings, breech block mechanism for heavy guns, and a large accumulation of others of equal importance. 1,000 specially made engravings. 396 octavo pages. Price $2.50

MECHANICAL MOVEMENTS, POWERS, AND DEVICES. BY GARDNER D. HISCOX. This is a collection of 1,890 engravings of different mechanical motions and appliances, accompanied by appropriate text, making it a book of great value to the inventor, the draftsman, and to all readers with mechanical tastes. The book is divided into eighteen sections or chapters in which the subject matter is classified under the following heads: Mechanical Powers: Transmission of Power; Measurement of Power, Steam Power; Air Power Appliances; Electric Power and Construction, Navigation and Roads; Gearing: Motion and Devices; Controlling Motion: Horological; Mining: Mill and Factory Appliances; Construction and Devices; Drafting Devices: Miscellaneous Devices, etc. 12th edition, 400 octavo pages. Price $2.50 MACHINE SHOP TOOLS AND SHOP PRACTICE. By W. H. VANDERvoort. A work of 555 pages and 673 illustrations, describing in every detail the construction, operation. and manipulation of both hand and machine tools. Includes chapters on filing, fitting, and scraping surfaces; on drills, reamers, taps, and dies; the lathe and its tools; planers, shapers, and their tools; milling machines and cutters; gear cutters and gear cutting; drilling machines and drill work; grinding machines and their work; hardening and tempering; gearing, belting and transmission machinery: useful data and tables. 6th edition. Price $3.00

THE MODERN MACHINIST. By JOHN T. USHER. This is a book showing, by plain description and by profuse engravings, made expressly for the work, all that is best, most advanced, and of the highest efficiency in modern machine shop practice, tools, and implements, showing the way by which and through which, as Mr. Maxim says, "American machinists have become and are the finest mechanics in the world." Indicating as it does, in every line, the familiarity of the author with every detail of daily experience in the shop, it cannot fail to be of service to any man practically connected with the shaping or finishing of metals.

There is nothing experimental or visionary about the book, all devices being in actual use and giving good results. It might be called a compendium of shop methods, showing a variety of special tools and appliances which will give new ideas to many mechanics, from the superintendent down to the man at the bench. It will be found a valuable addition to any machinist's library, and should be consulted whenever a new or difficult job is to be done, whether it is boring, milling, turning, or planing, as they are all treated in a practical manner. Fifth Edition. 320 pages. 250 illustrations. Price $2.50

MODERN MILLING MACHINES: THEIR DESIGN, CONSTRUCTION AND OPERATION. By JOSEPH G. HORNER.

This book describes and illustrates the Milling Machine and its work in such a plain, clear, and forceful manner, and illustrates the subject so clearly and completely, that the up-to-date machinist, student, or mechanical engineer cannot afford to do without the valuable information which it contains. It describes not only the early machines of this class, but notes their gradual development into the splendid machines of the present day, giving the design and construction of the various types, forms, and special features produced by prominent manufacturers, American and foreign.

Milling cutters in all their development and modernized forms are illustrated and described, and the operations they are capable of producing upon different classes of work are carefully described in detail, and the speeds and feeds necessary are discussed, and valuable and useful data given for determining these usually perplexing problems. The book is the most comprehensive work published on the subject. 301 pages. 300 illustrations. Price $4.00

"SHOP KINKS." By ROBERT GRIMSHAW.

A book of 400 pages and 222 illustrations, being entirely different from any other book on machine shop practice. Departing from conventional style, the author avoids universal or common shop usage and limits his work to showing special ways of doing things better, more cheaply and more rapidly than usual. As a result the advanced methods of representative establishments of the world are placed at the disposal of the reader. This book shows the proprietor where large savings are possible, and how products may be improved. To the employee it holds out suggestions that, properly applied, will hasten his advancement. No shop can afford to be without it. It bristles with valuable wrinkles and helpful suggestions. It will benefit all, from apprentice to proprietor. Every machinist, at any age, should study its pages. Fifth Edition. Price $2.50

THREADS AND THREAD CUTTING. By COLVIN and STABEL.

This clears up many of the mysteries of thread-cutting, such as double and triple threads, internal threads, catching threads, use of hobs, etc. Contains a lot of useful hints and several tables. 3rd Edition. Price .

25 cents TOOLS FOR MACHINISTS AND WOOD WORKERS, INCLUDING INSTRUMENTS OF MEASUREMENT. By JOSEPH G. HORNER.

The principles upon which cutting tools for wood, metal, and other substances are made are identical, whether used by the machinist, the carpenter, or by any other skilled mechanic in their daily work, and the object of this book is to give a correct and practical description of these tools as they are commonly designed, constructed, and used. 340 pages, fully illustrated. Price $3.50

MANUAL TRAINING

ECONOMICS OF MANUAL TRAINING. By Louis ROUILLION.

The only book published that gives just the information needed by all interested in Manual Training, regarding Buildings, Equipment, and Supplies. Shows exactly what is needed for all grades of the work from the Kindergarten to the High and Normal School. Gives itemized lists of everything used in Manual Training Work and tells just what it ought to cost. Also shows where to buy supplies, etc. Contains 174 pages, and is fully illustrated. 2nd Edition. Price $1.50

MARINE ENGINEERING

MARINE ENGINES AND BOILERS, THEIR DESIGN AND CONSTRUCTION. By DR. G. BAUER, LESLIE S. ROBERTSON, and S. BRYAN Donkin.

In the words of Dr. Bauer, the present work owes its origin to an oft felt want of a Condensed Treatise, embodying the Theoretical and Practical Rules used in Designing Marine Engines and Boilers. The need for such a work has been felt by most engineers engaged in the construction and working of Marine Engines, not only by the younger men, but also by those of greater experience. The fact that the original German work was written by the chief engineer of the famous Vulcan Works, Stettin, is in itself a guarantee that this book is in all respects thoroughly up-to-date, and that it embodies all the information which is necessary for the design and construction of the highest types of marine engines and boilers. It may be said, that the motive power which Dr. Bauer has placed in the fast German liners that have been turned out of late years from the Stettin Works, represent the very best practice in marine engineering of the present day.

This work is clearly written, thoroughly systematic, theoretically sound; while the character of its plans, drawings, tables, and statistics is without reproach. The illustrations are care. ful reproductions from actual working drawings, with some well-executed photographic views of completed engines and boilers. 744 pages. 550 illustrations and numerous tables. $9.00 net

MODERN SUBMARINE CHART.

A cross-section view, showing clearly and distinctly all the interior of a Submarine of the latest type. You get more information from this chart, about the construction and operation of a Submarine, than in any other way. No Details omitted-everything is accurate and to scale. It is absolutely correct in every detail, having been approved by Naval Engineers. All the machinery and devices fitted in a modern Submarine Boat are shown and to make the engraving more readily understood all the features are shown in operative form with Officers and Men in the act of performing the duties assigned to them in service conditions. This CHART IS REALLY AN ENCYCLOPEDIA OF A SUBMARINE. It is educational and worth many times its cost. Mailed in a Tube for .. 25 cents

MINING

ORE DEPOSITS, WITH A CHAPTER ON HINTS TO PROSPECTORS.
JOHNSON

By J. P.

This book gives a condensed account of the ore-deposits at present known in South Africa. It is also intended as a guide to the prospector. Only an elementary knowledge of geology and some mining experience are necessary in order to understand this work. With these qualifications, it will materially assist one in his search for metalliferous mineral occurrences

and, so far as simple ores are concerned. should enable one to form some idea of the possibilities of any he may find.

to

Among the chapters given are: Titaniferous and Chromiferous Iron Oxides-Nickel-Copper-Cobalt-Tin-Molybdenum-Tungsten-Lead-Mercury-Antimony-Iron-Hints Prospectors.

PHYSICS AND CHEMISTRY OF MINING. By T. H. BYROM.

$2.00

A practical work for the use of all preparing for examinations in mining or qualifying for colliery managers' certificates. The aim of the author in this excellent book is to place clearly before the reader useful and authoritative data which will render him valuable assistance in his studies. The only work of its kind published. The information incorporated in it will prove of the greatest practical utility to students, mining engineers, colliery managers, and all others who are specially interested in the present-day treatment of mining problems. Among its contents are chapters on: The Atmosphere; Laws Relating to the Behavior of Gases; The Diffusion of Gases; Composition of the Atmosphere: Sundry Constituents of the Atmosphere; Water; Carbon; Fire-Damp; Combustion; Coal Dust and Its Action; Explosives; Composition of Various Coals and Fuels; Methods of Analysis of Coal; Strata Adjoining the Coal Measures; Magnetism and Electricity; Appendix: Useful Tables, etc; Miscellaneous Questions. 160 pages. Illustrated. $2.00

PRACTICAL COAL MINING. By T. H. COCKIN.

An important work, containing 428 pages and 213 illustrations, complete with practical details, which will intuitively impart to the reader, not only a general knowledge of the principles of coal mining, but also considerable insight into allied subjects. This treatise is positively up to date in every instance, and should be in the hands of every colliery engineer, geologist, mine operator, superintendent, foreman, and all others who are interested in or connected with the industry. 2nd Edition. $2.50

PATTERN MAKING

PRACTICAL PATTERN MAKING. By F. W. BARROWS.

This is a very complete and entirely practical treatise on the subject of pattern making, illustrating pattern work in wood and metal. From its pages you are taught just what you should know about pattern making. It contains a detailed description of the materials used by pattern makers, also the tools, both those for hand use, and the more interesting machine tools; having complete chapters on the band saw, The Buzz Saw, and the Lathe. Individual patterns of many different kinds are fully illustrated and described, and the mounting of metal patterns on plates for molding machines is included.

Rules, Formulas and Tables are included, containing simple and original methods for finding the weight of castings, both from the pattern itself and from the drawings. This section contains some new and practical formulas, which will be found very useful in estimating weights, with the accuracy required for quotations to prospective customers. All of these rules are simple, and can be put to practical use by the ordinary, every-day man, and they have been proved by years of actual use.

Plain rules for keeping down the cost of patterns, with a complete system for checking the cost of and marking the patterns, and a card record showing what the pattern is, material used, where located in safe, with its cost and date of production, is included. The book closes with an original and practical method for the inventory and valuation of patterns. Concaining 326 pages and 150 detailed illustrations. Price

PERFUMERY

$2.00

HENLEY'S TWENTIETH CENTURY BOOK OF RECEIPTS, FORMULAS AND PROCESSES. Edited by G. D. Hiscox.

The most valuable Techno-chemical Receipt Book published. Contains over 10,000 practical receipts, many of which will prove of special value to the perfumer, a mine of information, upto-date in every respect. Price, Cloth, $3.00; half morocco $4.00

PERFUMES AND THEIR PREPARATION. By G. W. AsKINSON, Perfumer. A comprehensive treatise, in which there has been nothing omitted that could be of value to the Perfumer. Complete directions for making handkerchief perfumes, smelling-salts, sachets, fumigating pastilles: preparations for the care of the skin, the mouth, the hair, cosmetics, hair dyes and other toilet articles are given, also a detailed description of aromatic substances: their nature, tests of purity, and wholesale manufacture. A book of general, as well as professional interest, meeting the wants not only of the druggist and perfume manufacturer, but also of the general public. Third edition. 312 pages. Illustrated. $3.00

PLUMBING

MECHANICAL DRAWING FOR PLUMBERS. By R. M. STARBUCK.

6.

A concise, comprehensive and practical treatise on the subject of mechanical drawing in its various modern applications to the work of all who are in any way connected with the plumbing trade. Nothing will so help the plumber in estimating and in explaining work to customers and workmen as a knowledge of drawing, and to the workman it is of inestimable value if he is to rise above his position to positions of greater responsibility. Among the chapters contained are: 1. Value to plumber of knowledge of drawing; tools required and their use; common views needed in mechanical drawing. 2. Perspective versus mechanical drawing in showing plumbing construction. 3. Correct and incorrect methods in plumbing drawing; plan and elevation explained. 3. Floor and cellar plans and elevation: scale drawings; use of triangles. 5. Use of triangles; drawing of fittings, traps, etc. Drawing plumbing elevations and fittings. 7. Instructions in drawing plumbing elevations. 8. The drawing of plumbing fixtures; scale drawings. 9. Drawing of fixtures and fittings. 10. Inking of drawings. 11. Shading of drawings. 12. Shading of drawings. 13. Sectional drawings; drawing of threads. 14. Plumbing elevations from architect's plan. 15. Elevations of separate parts of the plumbing system. 16. Elevations from architect's plans. 17. Drawing of detail plumbing connections. 18. Architect's plans and plumbing elevations of residence. 19. Plumbing elevations of residence (continued): plumbing plans for cottage. 20. Plumbing elevations; roof connections. 21. Plans and plumbing elevations for six-flat building. 22. Drawing of various parts of the plumbing system; use of scales. 23. Use of architect's scales. 24. Special features in the illustrations of country plumbing. 25. Drawing of wrought iron piping, valves, radiators, coils, etc. 26. Drawing of piping to illustrate heating systems. 150 illustrations. Price . $1.50

MODERN PLUMBING ILLUSTRATED. By R. M. STARBUCK.

This book represents the highest standard of plumbing work. It has been adopted and used as a reference book by the United States Government, in its sanitary work in Cuba, Porto Rico, and the Philippines, and by the principal Boards of Health of the United States and Canada.

It gives connections, sizes and working data for all fixtures and groups of fixtures. It is helpful to the master plumber in demonstrating to his customers and in figuring work. It gives the mechanic and student quick and easy access to the best modern plumbing practice. Suggestions for estimating plumbing construction are contained in its pages. This book represents, in a word, the latest and best up-to-date practice, and should be in the hands of every architect, sanitary engineer and plumber who wishes to keep himself up to the minute on this important feature of construction. Contains following chapters, each illustrated with a full-page plate: Kitchen sink, laundry tubs, vegetable wash sink; lavatories. pantry sinks, contents of marble slabs; bath tub, foot and sitz bath, shower bath; water closets, venting of water closets; low-down water closets, water closets operated by flush valves, water closet range; slop sink, urinals, the bidet; hotel and restaurant sink, grease trap; refrigerators, safe wastes, laundry waste; lines of refrigerators, bar sinks, soda fountain sinks: horse stall, frost-proof water closets; connections for S traps, venting: connections for drum traps; soil pipe connections; supporting of soil pipe; main trap and fresh air inlet; floor drains and cellar drains, subsoil drainage; water closets and floor connections; local venting; connections for bath rooms; connections for bath rooms, continued; connections for bath rooms, continued; connections for bath rooms, continued; examples of poor practice; roughing-work ready for test; testing of plumbing system; method of continuous venting; continuous venting for two-floor work; continuous venting for two lines of fixtures on three or more floors; continuous venting of water closets; plumbing for cottage house; construction for cellar piping; plumbing for residence, use of special fittings; plumbing for two-flat house; plumbing for apartment building; plumbing for double apartment building; plumbing for office building; plumbing for public toilet rooms; plumbing for public toilet rooms, continued: plumbing for bath establishment; plumbing for engine house, factory plumbing; automatic flushing for schools, factories, etc.; use of flushing valves; urinals for public toilet rooms; the Durham system, the destruction of pipes by electrolysis; construction of work without use of lead; Automatic sewage lift, automatic sump tank; country plumbing: construction of cesspools: septic tank and automatic sewage siphon; country plumbing; water supply for country house; thawing of water mains and service by electricity; double boilers; hot water supply of large buildings; automatic control of hot water tank; suggestions for estimating plumbing construction. 400 octavo pages, fully illustrated by 55 full-page engravings. Price $4.00

STANDARD PRACTICAL PLUMBING. By R. M. STARBUCK.

A complete practical treatise of 450 pages covering the subject of Modern Plumbing in all its branches, a large amount of space being devoted to a very complete and practical treatment of the subject of Hot Water Supply and Circulation and Range Boiler Work. Its thirty chapters include about every phase of the subject one can think of, making it

an indispensable work to the master plumber, the journeyman plumber, and the apprentice plumber, containing chapters on: the plumber's tools; wiping solder, composition and use; joint wiping; lead work; traps; siphonage of traps; venting; continuous venting; house sewer and sewer connections; house drain; soil piping, roughing; main trap and fresh air inlet; floor, yard, cellar drains, rain leaders, etc.; fixture wastes; water closets; ventilation; improved plumbing connections; residence plumbing; plumbing for hotels, schools, factories, stables, etc.; modern country plumbing; filtration of sewage and water supply; hot and cold supply; range boilers; circulation; circulating pipes; range boiler problems; hot water for large buildings; water lift and its use; multiple connections for hot water boilers; heating of radiation by supply system; theory for the plumber; drawing for the plumber. Fully illustrated by 347 engravings. Price. $3.00

RECEIPT BOOK

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.

This is the most complete Book of Receipts ever published, giving thousands of receipts for the manufacturer of valuable articles for everyday use. Hints, Helps, Practical Ideas, and Secret Processes are revealed within its pages. It covers every branch of the useful arts and tells thousands of ways of making money and is just the book everyone should have at his command.

Modern in its treatment of every subject that properly falls within its scope, the book may truthfully be said to present the very latest formulas to be found in the arts and industries and to retain those processes which long experience has proven worthy of a permanent record To present here even a limited number of the subjects which find a place in this valuable work would be difficult. Suffice to say that in its pages will be found matter of intense interest and immeasurable practical value to the scientific amateur and to him who wishes to obtain a knowledge of the many processes used in the arts, trades and manufactures, a knowledge which will render his pursuits more instructive and remunerative. Serving as a reference book to the small and large manufacturer and suppplying intelligent seekers with the information necessary to conduct a process, the work will be found of inestimable worth to the Metallurgist, the Photographer, the Perfumer, the Painter, the Manufacturer of Glues, Pastes, Cements, and Mucilages, the Compounder of Alloys, the Cook, the Physician, the Druggist, the Electrician, the Brewer, the Engineer, the Foundryman, the Machinist, the Potter, the Tanner, the Confectioner, the Chiropodist, the Manicure, the Manufacturer of Chemical Novelties and Toilet Preparations, the Dyer, the Electroplater, the Enameler, the Engraver, the Provisioner, the Glass Worker, the Goldbeater, the Watchmaker, the Jeweler, the Hat Maker, the Ink Manufacturer, the Optician, the Farmer, the Dairyman, the Paper Maker, the Wood and Metal Worker, the Chandler and Soap Maker, the Veterinary Surgeon, and the Technologist in general.

A mine of information, and up-to-date in every respect. A book which will prove of value to EVERYONE, as it covers every branch of the Useful Arts. 800 pages. Price $3.00

WHAT IS SAID OF THIS BOOK:

I am

"Your Twentieth Century Book of Receipts, Formulas and Processes duly received. glad to have a copy of it, and if I could not replace it money couldn't buy it. It is the best thing of the sort I ever saw.' (Signed) M. E. TRUX,

Sparta, Wis.

"There are few persons who would not be able to find in the book some single formula that would repay several times the cost of the book."-Merchant's Record and Show Window.

RUBBER

RUBBER HAND STAMPS AND THE MANIPULATION OF INDIA RUBBER. By T. O'CONOR SLOANE.

This book gives full details on all points, treating in a concise and simple manner the elements of nearly everything it is necessary to understand for a commencement in any branch of the India Rubber Manufacture. The making of all kinds of Rubber Hand Stamps, Small Articles of India Rubber, U. S. Government Composition, Dating Hand Stamps, the Manipulation of Sheet Rubber, Toy Balloons, India Rubber Solutions, Cements, Blackings, Renovating