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MOLDING CONCRETE FLOWER-POTS, BOXES, JARDINIERES, ETC. By

A. A. HOUGHTON.
The molds for producing many original designs of flower-pots, urns, flower-boxes,
jardinieres, etc., are fully illustrated and explained, so the worker can easily construct
and operate same. (No. 10 of Series.)

50 cents MOLDING CONCRETE FOUNTAINS AND LAWN ORNAMENTS. By A. A.

HOUGHTON.
The molding of a number of designs of lawn seats, curbing, hitching posts, pergolas, sun
dials and other forms of ornamental concrete for the ornamentation of lawns and gar-
dens, is fully illustrated and described. (No. 11 of Series)

50 cents CONCRETE FROM SAND MOLDS. By A. A. HOUGHTON.

A Practical Work treating on a process which has heretofore been held as a trade secret by the few who possessed it, and which will successfully mold every and any class of ornamental concrete work. The process of molding concrete with sand molds is of the utmost practical value, possessing the manifold advantages of a low cost of molds, the ease and rapidity of operation, perfect details to all ornamental designs, density and increased strength of the concrete, perfect curing of the work without attention and the easy removal of the molds regardless of any undercutting the design may have. 192 pages. Fully illustrated. Price

$2.00 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. Price . $2.00

CONCRETE FOR THE FARM AND IN THE SHOP. By H. COLIN

CAMPBELL, C.E., E.M.
“Concrete for the Farm and in the Shop" is a new book from cover to cover, illustrat-
ing and describing in plain, simple language many of the numerous applications of
concrete within the range of the home worker. Among the subjects treated are:
Principles of reinforcing; methods of protecting concrete so as to insure proper harden-
ing; home-made mixers; mixing by hand and machine; form construction, described
and illustrated by drawings and photographs; construction of concrete walls and
fences; concrete fence posts; concrete gate posts; corner posts; clothes line posts;
grape arbor posts; tanks; troughs; cisterns; hog wallows; feeding floors and barn-
yard pavements; foundations; well curbs and platforms; indoor floors; sidewalks; steps;
concrete hotbeds and cold frames; concrete slab roofs; walls for buildings; repairing
leaks in tanks and cisterns; and all topics associated with these subjects as bearing
upon securing the best results from concrete are dwelt upon at sufficient length in plain
every-day English so that the inexperienced person desiring to undertake a piece of
concrete construction can, by following the directions set forth in this book, secure 100
per cent success every time. A number of convenient and practical tables for estimating
quantities, and some practical examples, are also given. (5 x 7.) 149 pages, 51 il-
lustrations. Price

$0.75

.

POPULAR HANDBOOK FOR CEMENT AND CONCRETE USERS. By MYRON

H. LEWIS.
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, including kinds of cement employed in construction, concrete
architecture, inspection and testing, waterproofing, coloring and painting, rules, tables,
working and cost data. The book comprises thirty-three chapters, as follows:
Introductory. Kinds of Cements and How They are Made. Properties. Testing
and Requirements of Hydraulic Cement. Concrete and its Properties. Sand, Broken
Stone and Gravel for Concrete. How to Proportion the Materials. How to Mix

and Place Concrete. Forms of Concrete Construction. The Architectural and Artistic Possibilities of Concrete. Concrete Residences. Mortars, Plasters and Stucco, and How to Use them. The Artistic Treatment of Concrete Surfaces. Concrete Building Blocks. The Making of Ornamental Concrete. Concrete Pipes, Fences, Posts, etc. Essential Features and Advantages of Reenforced Concrete. How to Design Reenforced Concrete Beams, Slabs and Columns. Explanations of the Methods and Principles in Designing Reenforced Concrete Beams and Slabs. Systems of Reenforcement Employed. Reenforced Concrete in Factory and General Building Construction. Concrete in Foundation Work. Concrete Retaining Walls, Abutments and Bulkheads. Concrete Arches and Arch Bridges. Concrete Beam and Girder Bridges. Concrete in Sewerage and Drainage Works. Concrete Tanks, Dams and Reservoirs. Concrete Sidewalks, Curbs and Pavements. Concrete in Railroad Constructions. The Utility of Concrete on the Farm. The Waterproofing of Concreto Structure. Grout of Liquid Concrete and Its Use. Inspection of Concrete Work. Cost of Concrete Work. Some of the special features of the book are: 1. The Attention Paid to the Artistic and Architectural Side of Concrete Work. 2. The Authoritative Treatment of the Problem of Waterproofing Concrete. 3. An Excellent Summary of the Rules to be Followed in Concrete Construction. 4. The Valuable Cost Data and Useful Tables given. A valuable Addition to the Library of Every Cement and Concrete User. Price.

$2.50

WHAT IS SAID OF THIS BOOK: The field of Concrete Construction is well covered and the matter contained is well within the understanding of any person.”Engineering-Contracting. “Should be on the bookshelves of every contractor, engineer, and architect in the

land."—National Builder. WATERPROOFING CONCRETE. By MYRON H. LEWIS.

Modern Methods of Waterproofing Concrete and Other Structures. A condensed statement of the Principles, Rules, and Precautions to be Observed in Waterproofing and Dampproofing Structures and Structural Materials. Paper binding. Illustrated. Price

50 cents

DICTIONARIES

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 handbook of reference containing definitions of about 5000 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. Price

$3.00

DIES/METAL WORK

DIES: THEIR CONSTRUCTION AND USE FOR THE MODERN WORKING OF

SHEET METALS. By J. V. WOODWORTH.
A most useful book, and one which should be in the hands of all engaged in the press
working of metals; treating on the Designing, Constructing, and Use of Tools, Fixtures
and Devices, together with the manner in which they should be used in the Power
Press, for the cheap and rapid production of the great variety of sheet-metal articles
now in use. It is designed as a guide to the production of sheet-metal parts at the
minimum of cost with the maximum of output. The hardening and tempering of
Press tools and the classes of work which may be produced to the best advantage by
the use of dies in the power press are fully treated. Its 505 illustrations show dies,
press fixtures and sheet metal working devices, the descriptions of which are so clear and
practical that all metal-working mechanics will be able to understand how to design,
construct and use them. Many of the dies and press fixtures treated were either
constructed by the author or under his supervision. Others were built by skilful
mechanics and are in use in large sheet-metal establishments and machine shops.
5th Edition. Price .

$3.00

PUNCHES, DIES AND TOOLS FOR MANUFACTURING IN PRESSES. By

J. V. WOODWORTH.
This work is a companion volume to the author's elementary work entitled “Dies, Their
Construction and Use." It does not go into the details of die-making to the extent of
the author's previous book, but gives a comprehensive review of the field of operations
carried on by presses. A large part of the information given has been drawn from the
author's personal experience. It might well be termed an Encyclopedia of Die-Making,
Punch-Making, Die-Sinking, Sheet-Metal Working, and Making of Special Tools, Sub-
presses, Devices and Mechanical Combinations for Punching, Cutting, Bending, Form-
ing, Piercing, Drawing, Compressing and Assembling Sheet-Metal Parts, and also Arti-
cles of other Materials in Machine Tools. 2d Edition. Price.

$4.00 DROP FORGING, DIE-SINKING AND MACHINE-FORMING OF STEEL. By

J. V. WOODWORTH.'
This is a practical treatise on Modern Shop Practice, Processes, Methods, Machine
Tools, and Details treating on the Hot and Cold Machine-Forming of Steel and Iron
into Finished Shapes; together with Tools, Dies, and Machinery involved in the
manufacture of Duplicate Forgings and Interchangeable Hot and Cold Pressed Parts
from Bar and Sheet Metal. This book fills a demand of long standing for information
regarding drop-forgings, die-sinking and machine-forming of steel and the shop
practice involved, as it actually exists in the modern drop-forging shop. The processes
of die-sinking and force-making, which are thoroughly described and illustrated in this
admirable work, are rarely to be found explained in such a clear and concise manner
as is here set forth. The process of die-sinking relates to the engraving or sinking of
the female or lower dies, such as are used for drop-forgings, hot and cold machine
forging, swedging and the press working of metals. The process of force-making
relates to the engraving or raising of the male or upper dies used in producing the
lower dies for the press-forming and machine-forging of duplicate parts of metal.
In addition to the arts above mentioned the book contains explicit information re-
garding the drop-forging, and hardening plants, designs, conditions, equipment, drop
hammers, forging machines, etc., machine forging, hydraulic forging, autogenous
welding and shop practice. The book contains eleven chapters, and the information
contained in these chapters is just what will prove most valuable to the forged-metal
worker. All operations described in the work are thoroughly illustrated by means of
perspective half-tones and outline sketches of the machinery employed. 300 detailed
illustrations. Price.

$2.50

DRAWING-SKETCHING PAPER

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. 4th Edition. 50 cents

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 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. There is included a self-explanatory chart which gives all information necessary for the thorough understanding of perspective. This chart alone is worth many times over the price of the book. 2d Revised and enlarged Edition.

$2.50

SELF-TAUGHT MECHANICAL DRAWING AND ELEMENTARY MACHINE

DESIGN. By F. L. .SYLVESTER, M.E., Draftsman, with additions by ERIK
OBERG, associate editor of “Machinery.”
This is a practical treatise on Mechanical Drawing and Machine Design, comprising
the first principles of geometric and mechanical drawing, workshop mathematics,
mechanics, strength of materials and the calculations and design of machine details.

The author's aim has been to adapt this treatise to the requirements of the practical mechanic and young draftsman and to present the matter in as clear and concise a manner as possible. To meet the demands of this class of students, practically all the important elements of machine design have been dealt with, and in addition algebraic formulas have been explained, and the elements of trigonometry treated in the manner best suited to the needs of the practical man. The book is divided into 20 chapters, and in arranging the material, mechanical drawing, pure and simple, has been taken up first, as a thorough understanding of the principles of representing objects facilitates the further study of mechanical subjects. This is followed by the mathematics necessary for the solution of the problems in machine design which are presented later, and a practical introduction to theoretical mechanics and the strength of materials. The various elements entering into machine design, such as cams, gears, sprocket-wheels, cone pulleys, bolts, screws, couplings, clutches, shafting and fly-wheels, have been treated in such a way as to make possible the use of the work as a text-book for a continuous course of study. It is easily comprehended and assimilated even by students of limited previous training. 330 pages, 215 engravings.

$2.00

Price :

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, 6x9 inches, 25 cents. Pads of 40 sheets, 9x12 inches, 50 cents; 40 sheets, 12x18, Price

$1.00

ELECTRICITY

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 simplest forms, and involving only ordinary arithmetic; each rule illustrated by one or more practical problems, with

detailed 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 manner that will attract the attention of those who are not familiar with algebraical formulas. 20th Edition. 160 pages. Price

$1.00

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. 4th Edition

25 cents DYNAMO BUILDING FOR AMATEURS, OR HOW TO CONSTRUCT A FIFTY

WATT DYNAMO. By ARTHUR J. WEED, Member of N. Y. Electrical Society. 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. Among the contents are chapters on: 1. Fifty-Watt Dynamo. 2. Side_Bearing Rods. 3. Field Punching. 4. Bearings. 5. Commutator. 6. Pulley. 7. Brush Holders. 8. Connection Board. 9. Armature Shaft. 10. Armature. 11. Armature Winding. 12. Field Winding. 13. Connecting and Starting. Price, paper, 50 cents. Cloth

$1.00 ELECTRIC WIRING, DIAGRAMS AND SWITCHBOARDS. By NEWTON

HARRISON.
A thoroughly practical treatise covering the subject of Electric Wiring in all its branches,
including explanations and diagrams which are thoroughly explicit and greatly simplify
the subject. Practical, every-day problems in wiring are presented and the method
of obtaining intelligent results clearly shown. Only arithmetic is used. Ohm's law

.

is given a simple explanation with reference to wiring for direct and alternating
currents. The fundamental principle of drop of potential in circuits is shown with its
various applications. The simple circuit is developed with the position of mains,
feeders and branches; their treatment as a part of a wiring plan and their employ-
ment in house wiring clearly illustrated. Some simple facts about testing are included
in connection with the wiring. Molding and conduit work are given careful considera-
tion; and switchboards are systematically treated, built up and illustrated, showing
the purpose they serve, for connection with the circuits, and to shunt and compound
wound machines. The simple principles of switchboard construction, the develop-
ment of the switchboard, the connections of the various instruments, including the
lightning arrester, are also plainly set forth.
Alternating current wiring is treated, with explanations of the power factor, conditions
calling for various sizes of wire, and a simple way of obtaining the sizes for single-phase,
two-phase and three-phase circuits. 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. Price

$1.50 ELECTRIC TOY MAKING, DYNAMO BUILDING, AND ELECTRIC MOTOR

CONSTRUCTION. By Prof. T. O'CONOR SLOANE.
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. The work
is especially designed for amateurs and young folks.
Thousands of our young people are daily experimenting, and busily engaged in making
electrical toys and apparatus of various kinds. The present work is just what is want-
ed to give the much needed information in a plain, practical manner, with illustrations
to make easy the carrying out of the work. 20th Edition. Price

$1.00 PRACTICAL ELECTRICITY. By Prof. T. O'CONOR SLOANE.

This work of 768 pages was previously known as Sloane's Electricians' Hand Book, and is intended for the practical electrician who has to make things go. The entire field of electricity is covered within its pages. Among some of the subjects_treated are: The Theory of the Electric Current and Circuit, Electro-Chemistry, Primary Batteries, Storage Batteries, Generation and Utilization of Electric Powers, Alternating Current, Armature Winding, Dynamos and Motors, Motor Generators, Operation of the Central Station Switchboards, Safety Appliances, Distribution of Electric Light and Power, Street Mains, Transformers, Arc and Incandescent Lighting, Electric Measurements, Photometry, Electric Railways, Telephony, BellWiring, Electric-Plating, Electric Heating, Wireless Telegraphy, etc. It contains no useless theory; everything is to the point. It teaches you just what you want to know about electricity. It is the standard work published on the subject. Fortyone chapters, 556 engravings. Price .

$2.50 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 metal, 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. 13th Edition. 172 pages. Illustrated. Price

$1.00

HOUSE WIRING. By THOMAS W. POPPE.

This work describes and illustrates the actual installation of Electric Light Wiring, the manner in which the work should be done, and the method of doing it. The book can be conveniently carried in the pocket. It is intended for the Electrician, Helper and Apprentice. It solves all Wiring Problems and contains nothing that conflicts with the rulings of the National Board of Fire Underwriters. It gives just the information essential to the Successful Wiring of a Building. Among the subjects treated are: Locating the Meter. Panel Boards. Switches. Plug Receptacles. Brackets. Ceiling Fixtures. The Meter Connections. The Feed Wires. The Steel Armored Cable System. The Flexible Steel Conduit System. The Ridig Conduit System. A digest of the National Board of Fire Underwriters' rules relating to metallic wiring systems. Various switching arrangements explained and diagrammed. The easiest method of

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