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Molding Concrete Chimneys, Slate and Roof Tiles. By A. A. HOUGHTON.

The manufacture of all types of concrete slate and roof tile is fully treated. Valuable data on all forms of reinforced concrete roofs' are contained within its pages. The construction of concrete chimneys by block and monolithic systems is fully illustrated and described. A number of ornamental designs of chimney construction with molds are shown in this valuable treatise. (No. 4 of Series.) Price

50 cents

Molding and Curing Ornamental Concrete. By A. A. HOUGHTON.

The proper proportions of cement and aggregates for various finishes, also the method of thoroughly mixing and placing in the molds, are fully treated. An exhaustive treatise on this subject that every concrete worker will find of daily use and value. (No. 5 of Series.) Price

50 cents

Concrete Monuments, Mausoleums and Burial Vaults. By A. A. HOUGHTON.

The molding of concrete monuments to imitate the most expensive cut stone is explained in this treatise, with working drawings of easily built molds. Cutting inscriptions and de signs are also fully treated. (No. 6 of Series.) Price

· 50 cents

Molding Concrete Bathtubs, Aquariums and Natatoriums. By A. A.

HOUGHTON.
Simple molds and instruction are given for molding many styles of concrete bathtubs, swim-
ming-pools, etc. These molds are easily built and permit rapid and successful work. (No. 7
of Series.) Price

50 cents

Concrete Bridges, Culverts and Sewers. By A. A. HOUGHTON.

A number of ornamental concrete bridges with illustrations of molds are given. A collapsible center or core for bridges, culverts and sewers is fully illustrated with detailed instructions for building. (No. 8 of Series.) Price

· 50 cents

Constructing Concrete Porches. By A. A. HOUGHTON.

A number of designs with working drawings of molds are fully explained so any one can easily construct different styles of ornamental concrete porches without the purchase of expensive molds. (No. 9 of Series.) Price

50 cents

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.) Price

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 gardens, is fully illustrated and described. (No. 11 of Series.) Price

50 cents

Concrete from Sand Molas. 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 à 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, illustrating 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 Hardening; 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 Barnyard 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 con. venient and practical tables for estimating quantities, and some practical examples, are also given. (5x7.) 149 pages. 51 illustrations. Price

.75 cents

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 an cost data. The book comprises thirty-three chapters, as follow: Introductory. Kinds of Cement 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 Draining Works. Concrete Tanks, Dams and Reservoirs. Concrete Sidewalks, Curbs and Pavements. Concrete in Railroad Construction. The Utility of Concrete on the Farm. The Waterproofing of Concrete Structures. 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

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

aviation Terms, Termes D’Aviation, English-French, French-English.

Compiled by Lieuts. VICTOR W. Pagé, A.S., S.C.U.S.R., and Paul Mon-
TARIOL, of the French Flying Corps, on duty on Signal Corps Aviation School,
Mineola, L. I.
The lists contained are confined to essentials, and special folding plates are included to show
all important airplane parts. The lists are divided in four sections as follows: 1.–Flying
Field Terms. 2.---The Airplane. 3.-The Engine. 4.-Tools and Shop Terms.
A complete, well illustrated volume intended to facilitate conversation between English-speak-
ing and French aviators. A very valuable book for all who are about to leave for duty over-
Approved for publication by Major W. G. Kilner, S.C., U.S.C.O. Signal Corps Aviation School,
Hazelhurst Field, Mineola, L. I. This book should be in every Aviator's and Mechanic's Kit
for ready reference. 128 pages, fully illustrated, with detailed engravings. Price

$1.00

seas.

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 5,000 distinct words, terms and phrases. The defin ions are terse concise and

clude 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 515 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.
6th Revised and Enlarged Edition. Price .

$3.00

Funches, Dies and Tools for Manufacturing in Presses. By J. V. Wood

WORTH.
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 terined an Encyclopedia of Die-Making, Punch-Making. Die-
Sinking, Sheet-Metal Working, and Making of Special Tools, Sub-presses, Devices and Mechani-
cal Combinations for Punching, Cutting, Bending, Forming, Piercing, Drawing, Compressing
and Assembling Sheet-Metal Parts, and also Articles of other Materials in Machine Tools.
2d Edition. Price

$4.09

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 engrav-
ing 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 regarding 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. Price

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, engineer ing 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. Price

$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
princiɔles 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 yourg 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 livile i 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 Ay-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
Dåges, 215 engravings. Price

$2.00

A New Sketching Paper.

A new specially ruled paper to enable you to make sketches or drawings in isometric perspec-
tive 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. Price

25 cents Pads of 40 sheets, 9x12 inches. Price

50 cents 40 sheets, 12x18 inches. 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.

Price

$1.00

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. 4th Edition. Price

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.
Paper. Price

50 cents Cloth. Price

$1.00

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Electric Bells. By M. B. SLEEPER.

A complete treatise for the practical worker in Installing, Operating and Testing Bell Circuits, Burglar Alarms, Thermostats, and other apparatus used with Electric Bells. Both the electrician and the experimenter will find in this book new material which is essential in their work. Tools, bells, batteries, unusual circuits, burglar alarms, annunciator systems, thermostats, circuit breakers, time alarms, and other apparatus used in bell circuits are described from the standpoints of their application, construction and repair. The detailed instruction for building the apparatus will appeal to the

experimenter particularly. The practical worker will find the chapter on Wiring, Calculation of Wire Sizes and Magnet Winding, Upkeep of Systems, and the Location of Faults, of the greatest value in their work. Among the chapters are: Tools and Materials for Bell Work; How and Why Bell Work; Batteries for Small Installations; Making Pells and Push Buttons; Wiring Bell Systems; Construction of Annunciators and Signals; Burglary Alarms and Auxiliary Apparatus; More Elaborate Bell Systems; Finding Faults and Remedying Them. 124 pages, fully illustrated. Price :

50 cents

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