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Books Received

Modern Practical Electricity. By R. Mullineux Wal

mesley. Volume IV. Pages 318. Published by W. T. Keener & Company, Chicago, Ill. Price, $3.00 per volume.

This is VOLUME IV of the work reviewed in the May issue of this magazine. The inductor alternator is discussed, with the application of the turbine for driving of the same, together with armature windings for two-phase and three-phase machines. The theory of alternator armature reaction, characteristic curves, and excitation, is taken up briefly. The connection of generators in parallel, both direct-and alternating-curr-o is treated in Chapter 3, the subject paralleling of alternators, of course, involving that of synchronizing.

Chapter 4 is devoted to continuous current motors of various types and makes. The latter part of the book is devoted to electrical testing and the different forms of galvanometers, meters, and measuring instruments.

pensive for the young workman, and are
defective in that they are too advanced.
The purpose of this book is to avoid both
these objections by furnishing informa-
these obie
tion from the beginning, and at a price
within the means of the poorest ap-
prentice.

The terms used in the branch of joinery are first explained. The simplest forms of stairs are considered first, so that the reader may advance step by step. The numerous diagrams show just how to place the strings, treads, and risers. Winding stairs are fully explained, as this form is more difficult of construction than the straight form.

Some excellent designs of newels are shown, as are also full-page illustrations of staircases.

Constructive Drawing. A Textbook for Home Instruc

tion, High Schools, Manual Training Schools, Technical Schools, and Universities. Arranged by Herman Hanstein, Supervisor of Drawing in the Chicago High Schools. Second Edition, Revised. Cloth. Pages 72. Plates. Published by Keuffel & Esser Company, Chicago, New York, St. Louis, and San Francisco. Price, $1.00.

Stair Building Made Easy. By Fred T. Hodgson.

Pages 160. Cloth. The Industrial Publication Com

pany, New York. Price, $1.00. AS THE AUTHOR SAYS in the preface, most books on this subject are too ex

AMONG NEW PUBLICATIONS in technical educational literature, this little book is timely and welcome. It covers thoroughly the most important constructions

Recent Engineering Books for Students

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Bell's Art of Illumination, . . . . 2.50
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De la Tour's Induction Motor, Its Theory and Design, 2.50
Gonzenbach's Engineering Preliminaries for an Interur-
ban Electric Railway,

- - - 1.00
Gotshall's Electric Railway Economics and Preliminary
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Goodell's Water Works for Small Cities and Towns, 2.00
Lyndon's Storage Battery Engineering, 2nd edition, . 3.00
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The Only Publication

in the World

Forge Practice. By John Lord Bacon. Published by

John Wiley & Sons, New York. Pages 257. Illustrated.

Cloth. Price, $1.50.
Devoted exclusively to Engi-

EVERY STUDENT taking forging, whether neering as applied to Marine

in a manual training school or college, work is Marine Engineering.

should have this little book. Instructors

in shop practice will find in it much valuSubscription per year

able matter. It is written in a simple $2.00 domestic

style, and contains the matter one would $2.50 foreign

expect to find in a book bearing such a Sample copy free

title. The fact that it has 273 illustra

tions shows how well its features are MARINE ENGINEERING presented graphically. These cuts are 309 Broadway, . . New York, U. S. A. practically all sketches showing positions

of tools and the pieces being forged. The chapters on Welding and Calculation of Stock are especially good. Other chap

ters are: Simple Forged Work, Steam Landscape Architecture.

Hammer Work, Duplicate Work, MetSTEPHEN CHILD. Boston Society

allurgy of Iron and Steel, Tool-Steel of Civil Engineers.

Work, Tool Forging and Tempering, Suggestions for Steel-Concrete

Miscellaneous Work.
Construction.
JOHN C. ANDERSON. Louisiana
Engineering Society.

Friction and Lubrication. A Handbook for Engineers,

Mechanics, Superintendents, and Managers, by WillPurification of Water.

iam M Davis. Cloth. Illustrated. Indexed. 8vo.

Pages 250. Published by the Lubrication Publishing
Prof. JOHN M. Ordway. Louisiana

Company, Pittsburg, Pa. Price, $2.00.
Engineering Society.

A PRACTICAL BOOK by a practical man. Boiler and Engine Test of a

Almost all books dealing with the Small Steamboat.

various kinds of machinery have a few WARREN JOHNSON. Louisiana En

pages on lubrication; but here are 250 gineering Society.

pages just on this subject. The book

treats of the theory of friction, various Journal of the Association

lubricants themselves, and the methods of Engineering Societies of applying the lubricants. The author

"begins at the beginning,” starts with July 1904

the reasons why lubricants are necessary, 30 Cents per Copy $3.00 per Annum

by a concise discussion on friction and

frictional losses. John C. TrauTWINE, JR., Secretary

An important chapter is that on test257 So. Fourth St., Philadelphia, Pa. ing oils. The various tests for viscosity,

flash point, burning point (fire test), specific gravity, evaporation, etc., are

carefully explained. Directions for makMention The Technical World.

INTERESTED IN MECHANICS?

Our monthly journal, MODERN MACHINERY, keeps you informed on progress in the mechanical field. Nicely illustrated, interestingly written. Valuable alike to shop man or plant owner. We give here the table of contents of the July, 1904, number. MACHINERY EXHIBIT AT ST. LOUIS.-A RATIONAL BASIS FOR WAGES.-CHAS.C. CHRISTENSEN, M.E.-TRE HERSTAL NATIONAL ARMORY.-MOLDING MACHINES.—THE ALTIMETER.-A TRAVELING MACHINE SHOP. -FORMING TWIST DRILLS.-PHOTO TAKEN BY RADIUM.-GERMAN HIGH-SPEED LOCOMOTIVE.-IRON AND STEE PROSPECTS IN FRANCE.-MACHINE FOR SPLITTING WOOD.-NEW FLOATING DOCK IN GERMANY.COST OF STEAM VS. HORSE POWER-REFRIGERATING MACH'Y IN BATTLESHIPS.- POWERFUL TOYS OF WEALTHY AMERICANS.-WASTED MACHINERY ON PANAMA CANAL.-ELECTRIC POWER ERA IN SCOTLAND. -PNEUMATIC MAIL TUBE TESTS IN CHICAGO.-THE PAY CHECK SYSTEM.-STORY TOLD AT WORLD'S PAIR.-NEW MACHINERY OF THE MONTH.-HINTS IN MECHANICAL ENGINEERING.-QUESTIONS AND ANSWERS.

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_With every sub

Iscription we send free any one of the three Premiums mentioned below. Subscribe now, $1.00 per year. No back numbers furnished The Handiest Thing in the World is a "Desk Watch" W x Haxe. Not Got Desk

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They will keep just as good time as an expensive watch: can be placed anywhere on your desk, or may be carried in your pocket. Once you find how convenient a desk watch is you will wonder how you ever got along without one. The watch is regular pocket size, full nickeled case, keeps accurate time and runs thirty hours with one winding.

Did You Ever Feel the need of a Stylo?

1 GRAVITY SA STYLO

A Stylo is a Pencil that writes with Ink-It is not a Pen. There is not a inan in the world who uses a lead pencil but has wished that it were possible to have a satisfactory pencil that used ink instead of lead. Well, here it is It is not

AMEAC the old

PATENTS

PENDING fashioned stylo with a stiff needle or spring needle; it has just been patented and placed on the market. It is called the Gravity Stylo, and its name signifies the principle on which it works. It is only another instance of going back to Nature's laws to

find success. One great advantage about these Stylos is that when left lying on the
desk they are at their best; even if left there for several days without any cap on they
will not leak and will be ready to write the instant the point touches the paper. For
ruling purposes they are unequaled. Ruling done with a Stylo is as even and per-
fect as that done by machinery. If you have a Stylo you have a pencil that is
always ready (just like a lead pencil), the advantage being that ink is used.

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How Far Do You Walk

in a Day?

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Did it ever occur to you that perhaps you walked miles
just going around your shop or office? Perhaps
you'd like to know. If so, get a Pedometer. A

Modern

Machinery, Pedometer is an ingenious aff air that goes when

Security Bldg. you go and stops when you stop. You put

Chicago it in your pocket like a watch (it's smaller

GENTLEMEN: than a watch, too), and when you want to

Enclosed find know how far you have walked, all you

81.00 for which please have to do is to look at the Pedometer.

send Modern MachinThese instruments have hereto

ery for one yenr, and

in accordance with your fore been very expensive, costing

offer, please send me, free from ten to fifteen dollars,

of charge, One Desk Watch. but this one has just been

One Stylo. One Pedometer. placed on the market. It is

(Kindly encercle one desired). not a toy, but an accurate

Yours truly,
and valuable recorder
of distance which any
man will find it worth
while to have.

CUT OUT AND MAIL TO-DAY

Mention The Technical World.

LITERATURE-(Continued)

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ing a chemical analysis with simple instruments, add to the practical value of the work. The dividing up of the book into short chapters adds much to its convenience, as information upon the lubrication of any given class of machinery is readily found. There are chapters on lubricating appliances ; lubrication of gas engines, automobiles, and street-railway cars; oiling devices and systems; treatment of hot bearings; lubrication of refrigerating, mining, and textile machinery, etc.

This is by far the best book we have ever seen on this subject, and one that is worth far more than the price asked for it.

Magazines Cassier's Magazine (September)—New York "MATHEMATICS IN ENGINEERING” is the title of a discussion on the value and use of pure mathematics in engineering. The writer, Mr. Thorburn Reid, says mathematicians unconsciously grow to think of the solution of a problem, not as a means to an end, but as the end itself. He advances the idea that mathematics would be more valuable if properly taught. The fact that few teachers are practical engineers is responsible for

the prevailing defects. As the teacher Containing Descriptive and Technical

seldom, if ever, has an opportunity to Articles by the World's Best

check his results by practical application, Telephone Engineers

he naturally gives problems of little A Subscriber Says:

practical value, and his methods of an"My interest for your

alysis are either defective or absolutely wrong.

Many incidents are cited, showing the value of practical knowledge, some proving that a shrewd estimate is often as

reliable as extended calculation.
BERTIL BRANDER,
Telephone Engineer,

“Vacuum-Tube Lighting," by D. McBerlin, Germany.

Farlan Moore, describes the new forin Published Weekly. Subscription

of illumination based upon a gaseous Price $1.00 a year. Write for Free electrical conductor for the source of Sample Copy. Special Inducements light. The article sets forth the adto Students who will Act as Agents.

vantages of the vacuum tube over the American Telephone Journal arc light, the main points being its difMORTON BUILDING

fusion and closer imitation of daylight. NEW YORK

The illustrations show rooms lighted by this method, and diagrams indicate rel

ative locations of parts. Mention The Technical World.

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