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clear and definite understanding of all orders which may be used. The meaning and necessity for certain rules are explained in such a manner that the student may know beyond a doubt the rights conferred under any orders he may receive or the action required by certain rules. As nearly all roads require trainmen to pass regular examinations, a complete set of examination questions, with their answers, are included. These will enable the student to pass the required examinations with credit to himself and the road for which he works. 256 pages. Fully illustrated with Train Signals in Colors. Price . $1.25 THE WALSCHAERT AND OTHER MODERN RADIAL VALVE GEARS FOR LOCOMOTIVES. By Wм. W. WOOD.

If you would thoroughly understand the Walschaert Valve Gear you should possess a copy of this book, as the author takes the plainest form of a steam engine a stationary engine in the rough, that will only turn its crank in one direction-and from it builds up-with the reader's help-a modern locomotive equipped with the Walschaert Valve Gear, complete. The points discussed are clearly illustrated; two large folding plates that show the positions of the valves of both inside or outside admission type, as well as the links and other parts of the gear when the crank is at nine different points in its revolution, are especially valuable in making the movement clear. These employ sliding cardboard models which are contained in a pocket in the cover.

The book is divided into five general divisions, as follows: 1. Analysis of the gear. 2. Designing and erecting the gear. 3. Advantages of the gear. 4. Questions and answers relating to the Walschaert Valve Gear. 5. Setting valves with the Walschaert Valve Gear; the three primary types of locomotive valve motion; modern radial valve gears other than the Walschaert; the Hobart All-free Valve and Valve Gear, with questions and answers on breakdowns; the Baker-Pilliod Valve Gear; the Improved Baker-Pilliod Valve Gear, with questions and answers on breakdowns. The questions with full answers given will be especially valuable to firemen and engineers in preparing for an examination for promotion. 245 pages. Third Revised Edition. Price $1.50 WESTINGHOUSE E-T AIR-BRAKE INSTRUCTION POCKET BOOK. By Wм. W. WOOD, Air-Brake Instructor.

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Here is a book for the railroad man, and the man who aims to be one. It is without
doubt the only complete work published on the Westinghouse E-T Locomotive Brake
Equipment. Written by an Air-Brake Instructor who knows just what is needed. It
covers the subject thoroughly. Everything about the New Westinghouse Engine and
Tender Brake Equipment, including the standard No. 5 and the Perfected No. 6
style of brake, is treated in detail. Written in plain English and profusely illustrated
with Colored Plates, which enable one to trace the flow of pressures throughout the
entire equipment. The best book ever published on the Air Brake. Equally good for
the beginner and the advanced engineer. Will pass any one through any examination.
It informs and enlightens you on every point. Indispensable to every engineman and
trainman.

Contains examination questions and answers on the E-T equipment. Covering what
the E-T Brake is. How it should be operated. What to do when defective. Not a
question can be asked of the engineman up for promotion, on either the No. 5 or the
No. 6 E-T equipment, that is not asked and answered in the book. If you want to
thoroughly understand the E-T equipment get a copy of this book. It covers every
detail. Makes Air-Brake troubles and examinations easy. Price
$1.50

MACHINE-SHOP PRACTICE

AMERICAN TOOL MAKING AND INTERCHANGEABLE MANUFACTURING. By J. V. WOODWORTH.

A "shoppy" book, containing no theorizing, no problematical or experimental devices, there are no badly proportioned and impossible diagrams, no catalogue cuts, but a valuable collection of drawings and descriptions of devices, the rich fruits of the author's own experience. In its 500-odd pages the one subject only, Tool Making, and whatever relates thereto, is dealt with. The work stands without a rival. It is a complete practical treatise on the art of American Tool Making and system of interchangeable manufacturing as carried on to-day in the United States. In it are described and illustrated all of the different types and classes of small tools, fixtures, devices, and special appliances which are in general use in all machine-manufacturing and metalworking establishments where economy, capacity, and interchangeability in the production of machined metal parts are imperative. The science of jig making is exhaust

ively discussed, and particular attention is paid to drill jigs, boring, profiling and milling
fixtures and other devices in which the parts to be machined are located and fastened
within the contrivances. All of the tools, fixtures, and devices illustrated and de-
scribed have been or are used for the actual production of work, such as parts of drill
presses, lathes, patented machinery, typewriters, electrical apparatus, mechanical ap-
pliances, brass goods, composition parts, mould products, sheet metal articles, drop-
forgings, jewelry, watches, medals, coins, etc. 531 pages. Price
$4.00

MACHINE-SHOP ARITHMETIC. BY COLVIN-CHENEY.

This is an arithmetic of the things you have to do with daily. It tells you plainly
about: how to find areas in figures; how to find surface or volume of balls or spheres;
handy ways for calculating; about compound gearing; cutting screw threads on any
lathe; drilling for taps; speeds of drills; taps, emery wheels, grindstones, milling
cutters, etc.; all about the Metric system with conversion tables; properties of metals;
strength of bolts and nuts; decimal equivalent of an inch. All sorts of machine-shop
figuring and 1,001 other things, any one of which ought to be worth more than
the price of this book to you, and it saves you the trouble of bothering the boss. 6th
edition. 131 pages. Price
50 cents

MODERN MACHINE-SHOP CONSTRUCTION, EQUIPMENT AND MANAGE-
MENT. By OSCAR E. PERRIGO.

The only work published that describes the Modern Shop or Manufacturing Plant
from the time the grass is growing on the site intended for it until the finished product
is shipped. Just the book needed by those contemplating the erection of modern shop
buildings, the rebuilding and reorganization of old ones, or the introduction of Modern
Shop Methods, time and cost systems. It is a book written and illustrated by a prac-
tical shop man for practical shop men who are too busy to read theories and want facts.
It is the most complete all-round book of its kind ever published. 400 large quarto
pages. 225 original and specially-made illustrations. 2d Revised and Enlarged
Edition. Price
$5.00

THE WHOLE FIELD OF MECHANICAL MOVEMENTS

COVERED BY MR. HISCOX'S TWO BOOKS

We publish two books by Gardner D. Hiscox that will keep you from "inventing” things that have been done before, and suggest ways of doing things that you have not thought of before. Many a man spends time and money, pondering over some mechanical problem, only to learn, after he has solved the problem, that the same thing has been accomplished and put in practice by others long before. Time and money spent in an effort to accomplish what has already been accomplished are time and money LOST. The whole field of mechanics, every known mechanical movement, and practically every device is covered by these two books. If the thing you want has been invented, it is illustrated in them. If it hasn't been invented, then you'll find in them the nearest things to what you want, some movements or devices that will apply in your case, perhaps; or which will give you a key from which to work. No book or set of books ever published is of more real value to the Inventor, Draftsman, or practical Mechanic than the two volumes described below.

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 MECHANICAL APPLIANCES, MECHANICAL MOVEMENTS AND NOVELTIES OF CONSTRUCTION. BY GARDNER D. HISCOX.

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This is a supplementary volume to the one upon mechanical movements. Unlike the first volume, which is more elementary in character, this volume contains illustrations and descriptions of many combinations of motions and of mechanical devices and

$2.50

appliances found in different lines of machinery, each device being shown by a line drawing with a description 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 lock 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. 2d Edition. Price 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.

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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 edition 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 illustra-
tions. Price
$2.50

"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. Third edition. Price
25 cents

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.

2d edition. Price

$1.50

MARINE ENGINEERING

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-every-
thing 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 per-
forming 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

PATTERN MAKING

PRACTICAL PATTERN MAKING. By F. W. BARROWS.

This book, now in its second edition, is a comprehensive and entirely practical treatise
on the subject of pattern making, illustrating pattern work in both wood and metal,
and with definite instructions on the use of plaster of paris in the trade.
It gives
specific and detailed descriptions of the materials used by pattern makers and de-
scribes the tools, both those for the bench and the more interesting machine tools;
having complete chapters on the Lathe, the Circular Saw, and the Band Saw. It gives
many examples of pattern work, each one fully illustrated and explained with much
detail. These examples, in their great variety, offer much that will be found of
interest to all pattern makers, and especially to the younger ones, who are seeking
information on the more advanced branches of their trade.

In this second edition of the work will be found much that is new, even to those who
have long practised this exacting trade. In the description of patterns as adapted
to the Moulding Machine many difficulties which have long prevented the rapid and
economical production of castings are overcome; and this great, new branch of the
trade is given much space. Stripping plate and stool plate work and the less expen-
sive vibrator, or rapping plate work, are all explained in detail.

Plain, everyday rules for lessening the cost of patterns, with a complete system of cost keeping, a detailed method of marking, applicable to all branches of the trade, with complete information showing what the pattern is, its specific title, its cost, date of production, material of which it is made, the number of pieces and coreboxes, and its location in the pattern safe, all condensed into a most complete card record, with cross index.

The book closes with an original and practical method for the inventory and valuation of patterns. Containing nearly 350 pages and 170 illustrations. Price. $2.00

PERFUMERY

PERFUMES AND COSMETICS, THEIR PREPARATION AND MANUFACTURE. By G. W. ASKINSON, Perfumer.

A comprehensive treatise, in which there has been nothing omitted that could be of value to the perfumer or manufacturer of toilet preparations. 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, including a chapter on synthetic products, with formulas for their use. 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. Among the contents are: 1. The History of Perfumery. 2. About Aromatic Substances in General. 3. Odors from the Vegetable Kingdom. 4. The Aromatic Vegetable Substances Employed in Perfumery. 5. The Animal Substances Used in Perfumery. 6. The Chemical Products Used in Perfumery. 7. The Extraction of Odors. 8. The Special Characteristics of Aromatic Substances. 9. The Adulteration of Essential Oils and Their Recognition. 10. Synthetic Products. 11. Table of Physical Properties of Aromatic Chemicals. 12. The Essences or Extracts Employed in Perfumery. 13. Directions for Making the Most Important Essences and Extracts.

14. The Division of Perfumery. 15. The Manufacture of Handkerchief Perfumes.
16. Formulas for Handkerchief Perfumes. 17. Ammoniacal and Acid Perfumes.
18. Dry Perfumes. 19. Formulas for Dry Perfumes. 20. The Perfumes Used for
Fumigation. 21. Antiseptic and Therapeutic Value of Perfumes. 22. Classification of
Odors. 23. Some Special Perfumery Products. 24. Hygiene and Cosmetic Perfumery.
25. Preparations for the Care of the Skin. 26. Manufacture of Casein. 27. Formulas
for Emulsions. 28. Formulas for Cream. 29. Formulas for Meals, Pastes and Vege-
table Milk. 30. Preparations Used for the Hair. 31. Formulas for Hair Tonics and
Restorers. 32. Pomades and Hair Oils. 33. Formulas for the Manufacture of
Pomades and Hair Oils. 34. Hair Dyes and Depilatories. 35. Wax Pomades, Bando-
lines and Brilliantines. 36. Skin Cosmetics and Face Lotions. 37. Preparations for
the Nails. 38. Water Softeners and Bath Salts. 39. Preparations for the Care of the
Mouth. 40. The Colors Used in Perfumery. 41. The Utensils Used in the Toilet.
Fourth edition much enlarged and brought up-to-date. Nearly 400 pages, illus-
trated. Price
$5.00

WHAT IS SAID OF THIS BOOK:

"The most satisfactory work on the subject of Perfumery that we have ever seen.
"We feel safe in saying that here is a book on Perfumery that will not disappoint you,
for it has practical and excellent formulæ that are within your ability to prepare
readily.
"We recommend the volume as worthy of confidence, and say that no purchaser will be
disappointed in securing from its pages good value for its cost, and a large dividend
on the same, even if he should use but one per cent of its working formulæ.
is money in it for every user of its information."-Pharmaceutical Record.

PLUMBING

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

There

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 mechan-
ical drawing. 2. Perspective versus mechanical drawing in showing plumbing con-
struction. 3. Correct and incorrect methods in plumbing drawing; plan and elevation
explained. 4. Floor and cellar plans and elevation; scale drawings; use of triangles.
5. Use of triangles; drawing of fittings, traps, etc. 6. Drawing plumbing elevations
and fittings. 7. Instructions in drawing plumbing elevations. 8. The drawing of
plumbing fixtures; scale drawings. 9. Drawings 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. Ele-
vations of separate parts of the plumbing system. 16. Elevations from the architect's
plans. 17. Drawings of detail plumbing connections. 18. Architect's plans and plumb-
ing elevations of residence. 19. Plumbing elevations of residence (continued); plumb-
ing plans for cottage. 20. Plumbing elevations; roof connections. 21. Plans and
plumbing elevations for six-flat building. 22. Drawing of various parts of the plumb-
ing 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, radia-
tors, 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

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