STEAM HEATING AND VENTILATION

PRACTICAL STEAM, HOT-WATER HEATING AND VENTILATION. By A. G. KING. This book is the standard and latest work published on the subject and has been prepared for the use of all engaged in the business of steam, hot-water heating and ventilation. It is an original and exhaustive work. Tells how to get heating contracts, how to install heating and ventilating apparatus, the best business methods to be used, with "Tricks of the Trade" for shop use. Rules and data for estimating radiation and cost and such tables and information as make it an indispensable work for everyone interested in steam, hot-water heating and ventilation. It describes all the principal systems of steam, hot-water, vacuum, vapor and vacuumvapor heating, together with the new accelerated systems of hot-water circulation, including chapters on up-to-date methods of ventilation and the fan or blower system of heating and ventilation.

You should secure a copy of this book, as each chapter contains a mine of practical information. 367 pages, 300 detailed engravings. $3.00

STEAM PIPES

STEAM PIPES: THEIR DESIGN AND CONSTRUCTION. By Wм. H. BOOTH. The work is well illustrated in regard to pipe joints, expansion offsets, flexible joints, and self-contained sliding joints for taking up the expansion of long pipes. In fact, the chapters on the flow of Steam and expansion of pipes are most valuable to all steam fitters and users. The pressure strength of pipes and method of hanging them is well treated and illustrated. Valves and by-passes are fully illustrated and described, as are also flange joints and their proper proportions. Exhaust heads and separators. One of the most valuable chapters is that on superheated steam and the saving of steam by insulation with the various kinds of felting and other materials, with comparison tables of the loss of heat in thermal units from naked and felted steam pipes. Contains 187 pages.

STEEL

$2.00

AMERICAN STEEL WORKER. By E. R. MARKHAM. The standard work on hardening, tempering and annealing steel of all kinds. A practical book for the machinist, tool maker or superintendent. Shows just how to secure best results in any case that comes along. How to make and use furnaces and case harden; how to handle high-speed steel and how to temper for all classes of work. $2.50

HARDENING, TEMPERING, ANNEALING, AND FORGING OF STEEL. By J. V. WOODWORTH. A new book containing special directions for the successful hardening and tempering of all steel tools. Milling cutters, taps, thread dies, reamers, both solid and shell, hollow mills, punches and dies, and all kinds of sheet-metal working tools, shear blades, saws, fine cutlery and metal-cutting tools of all descriptions, as well as for all implements of steel both large and small, the simplest, and most satisfactory hardening and tempering processes are presented. The uses to which the leading brands of steel may be adapted are concisely presented, and their treatment for working under different conditions explained, as are also the special methods for the hardening and tempering of special brands. 320 pages, 250 illustrations.

$2.50

HENLEY'S TWENTIETH CENTURY BOOK OF RECEIPTS, FORMULAS AND PROCESSES. Edited by GARDNER D. HISCOX. The most valuable techno-chemical Receipt book published, giving, among other practical receipts, methods of annealing, coloring, tempering, welding, plating, polishing and cleaning steel. See page 24 for full description of this book. $3.00

WATCH MAKING

HENLEY'S TWENTIETH CENTURY BOOK OF RECEIPTS, FORMULAS AND PROCESSES. Edited by GARDNER D. Hiscox. Contains upwards of 10,000 practical formulas including many watchmakers' formulas.

$3.00

WATCHMAKER'S HANDBOOK. By CLAUDIUS SAUNIER. No work issued can compare with this book for clearness and completeness. It contains 498 pages and is intended as a workshop companion for those engaged in Watchmaking and allied Mechanical Arts. Nearly 250 engravings and fourteen plates are included.

WIRELESS TELEPHONES

$3.00

WIRELESS TELEPHONES AND HOW THEY WORK. By JAMES ERSKINE-MURRAY. This work is free from elaborate details and aims at giving a clear survey of the way in which Wireless Telephones work. It is intended for amateur workers and for those whose knowledge of Electricity is slight. Chapters contained: How We Hear-Historical-The Conversion of Sound into Electric Waves-Wireless Transmission-The Production of Alternating Currents of High Frequency-How the Electric Waves are Radiated and Received-The Receiving Instruments-Detectors-Achievements and ExpectationsGlossary of Technical Words. Cloth.

$1.00

Contains over 10,000 Selected Scientific, Chemical, Technological and Practical Recipes and Processes, including Hundreds of

T

So-Called Trade Secrets

for Every Business

HIS book of 800 pages is the most complete Book of Recipes ever published, giving thousands of recipes for the manufacture of valuable articles for every-day 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.

The pages are filled with matters of intense interest and immeasurable practical value to the Photographer, the Perfumer, the Painter, the Manufacturer of Glues, Pastes, Cements and Mucilages, the Physician, the Druggist, the Electrician, the Brewer, the Engineer, the Foundryman, the Machinist, the Potter, the Tanner, the Confectioner, the Chiropodist, 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 and Jeweler, the Ink Manufacturer, the Optician, the Farmer, the Dairyman, the Paper Maker, the Metal Worker, the Soap Maker, the Veterinary Surgeon, and the Technologist in general.

A book to which you may turn with confidence that you will find what you are looking for. A mine of information up-to-date in every respect. Contains an immense number of formulas that every one ought to have that are not found in any other work.