Henley's Twentieth Century Book of Receipts, Formulas and Processes. Edited by G. D. HISCOX. The most valuable techno-chemical receipt book published. Contains over 10,000 practical receipts, many of which will prove of special value to the perfumer. Price, $4.00 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 pastiles; 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. Fourth edition much enlarged and brought up-to-date. Nearly 400 pages, illustrated, $5.00 PLUMBING Standard Practical Plumbing. By R. M. STARBUCK. This is a complete treatise and covers the subject of modern plumbing in all its branches. It treats exhaustively on the skilled work of the plumber and the theory underlying plumbing devices and operations, and commends itself at once to anyone working in any branch of the plumbing trade. A large amount of space is devoted to a very complete and practical treatment of the subjects of hot water supply, circulation and range boiler work. Another valuable feature is the special chapter on drawing for plumbers. The illustrations, of which there are three hundred and forty-seven, one hundred being full-page plates, were drawn expressly for this book and show the most modern and best American practice in plumbing_construction. 61⁄2 x 94. Cloth, 406 pages, 347 illustrations. Price, $3.50 Mechanical Drawing for Plumbers. By R. M. STARBUCK. 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. 150 illustrations. Price, $2.00 By R. M. STARBUCK. The author of this book, Mr. R. M. Starbuck, is one of the leading authorities on plumbing in the United States. The book represents the highest standard of plumbing work. A very comprehensive work, illustrating and describing the drainage and ventilation of dwellings, apartments and public buildings. The very latest and most approved methods in all branches of sanitary installation are given. The standard book for master plumbers, architects, builders, plumbing inspectors, boards of health, boards of plumbing examiners and for the property owner, as well as the workman and apprentice. It contains fifty-seven entirely new and large full pages of illustrations with descriptive text, all of which have been made specially for this work. These plates show all kinds of modern plumbing work. Each plate is accompanied by several pages of text, giving notes and practical suggestions, sizes of pipe, proper measurements for setting up work, etc. Suggestions on estimating plumbing construction are also included. 407 octavo pages, fully illustrated by 57 full-page engravings, Price, $5.00 RECIPE BOOK Henley's Twentieth Century Book of Recipes, Formulas and Processes. Edited by GARDNER D. HISCOX. The most valuable technochemical formulæ book published, including over 10,000 selected scientific, chemical, technological and practical recipes and processes. This book of 800 pages is the most complete book of recipes ever published, 'giving thousands of recipes for the manufacture of valuable articles for everyday 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 prac tical value to the photographer, the perfumer, the painter, the manufacturer of glues, pastes, cements and mucilages, the physician, the druggist, the electrician, the dentist, 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. 1920 edition. Cloth binding. Price, $4.00 Henley's Twentieth Century Book of Receipts, Formulas and Processes. Edited by GARDNER D. HISCOX. Contains upward of 10,000 practical receipts, including among them formulas on artificial rubber. Price, $4.00 Rubber Hand Stamps and the Manipulation of India Rubber. By T. O'CONOR SLOANE. This book gives full details of all points, treating in a concise and simple manner the elements of nearly everything it is necessary to understand for a commencement in any branch of the India rubber manufacture. The making of all kinds of rubber hand stamps, small articles of India rubber, U. S. Government composi tion, dating hand stamps, the manipulation of sheet rubber, toy balloons, India rubber solutions, cements, blackings, renovating varnish, and treatment for India rubber shoes, etc.; the hektograph stamp inks, and miscellaneous tes, with a short account of the discovery, collection and manu facture of India rubber are set forth in a manner designed to be readily understood, the explanation being plain and simple. Third edition. 175 pages, illustrated. Price, $1.25 SAWS Saw Filing and Management of Saws. A By ROBERT GRIMSHAW. A practical hand book on filing, gumming, swaging, hammering and the brazing of band saws, the speed, work, and power to run circular saws, etc. handy book for those who have charge of saws, or for those mechanics who do their own filing, as it deals with the proper shape and pitches of saw teeth of all kinds and gives many useful hints and rules for gumming, setting, and filing, and is a practical aid to those who use saws for any purpose. Third edition, revised and enlarged. Illustrated. Price, $1.50 SCREW CUTTING Threads and Thread Cutting. By COLVIN and STABLE. 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. 35 cents STEAM ENGINEERING Horse-power Chart. Shows the horse-power of any stationary engine without calculation. No matter what the cylinder diameter or stroke; the steam pressure or cut-off; the revolutions, or whether condensing or non-condensing, it's all there. Easy to use, accurate, and saves time and calculations. Especially useful to engineers and designers. Price, 50 cents By H. HAMKENS. It is safe to say that no book has ever been published which gives the practical engineer such valua ble and comprehensive information on steam engine design and troubles. There are descriptions of cylinders, valves, pistons, frames, pillow blocks and other bearings, connecting rods, wristplates, dashpots, reachrods, valve gears, governors, piping, throttle and emergency valves, safety stops, flywheels, oilers, etc. If there is any trouble with these parts, the book gives you the reasons and tells how to remedy them. 350 pages, 276 illustrations. Price, $2.50 American Stationary Engineering. By W. E. CRANE. A new book by a well-known author. Begins at the boiler room and takes in the whole power plant. Contains the result of years of practical experience in all sorts of engine rooms and gives exact information that cannot be found elsewhere. It's plain enough for practical men and yet of value to those high in the profession. Has a complete examination for a license. Third edition revised and enlarged. 345 pages. 131 illustrations. Cloth. Price, $2.50 Steam Engine Catechism. By ROBERT GRIMSHAW, This volume of 413 pages is not only a catechism on the question and answer principle, but it contains formulas and worked-out answers for all the steam problems that appertain to the operation and management of the steam engine. Sixteenth edition. Price, $2.00 Boiler Room Chart. By GEO. L. FOWLER. A chart-size 14 x 28 inches-showing in isometric perspective the mechanism belonging in a modern boiler room. The various parts are shown broken or removed, so that the internal construction is fully illustrated. Each part is given a reference number, and these, with the corresponding name, are given in a glossary printed at the sides. Price, 25 cents Engine Runner's Catechism. By ROBERT GRIMSHAW. Tells how to erect, adjust and run the principal steam engines in use in the United States. The work is of a handy size for the pocket. To young engineers this catechism will be of great value, especially to those who may be preparing to go forward to be examined for certificates of competency; and to engineers generally it will be of no little service, as they will find in this volume more really practical and useful information than is to be found anywhere else within a like compass. 387 pages. Seventh Price, $2.00 edition. Modern Steam Engineering in Theory and Practice. By GARDNER D. HISCOX. This is a complete and practical work issued for stationary engineers and firemen dealing with the care and management of boilers, engines, pumps, superheated steam, refrigerating machinery, dynamos, motors, elevators, air compressors, and all other branches with which the modern engineer must be familiar. Nearly 200 questions with their answers on steam and electrical engineering, likely to be asked by the examining board, are included. Third edition. 487 pages, 405 engravings. Cloth. Price, $3.50 By COLVIN-CHENEY. A practical pocket book for the steam engineer. Shows how to work the problems of the engine room and shows "why." Tells how to figure horse-power of engines and boilers; area of boilers; has tables of areas and circumferences; steam tables; has a dictionary of engineering terms. Puts you onto all of the little kinks in figuring whatever there is to figure around a power plant. Tells you about the heat unit; absolute zero; adiabatic expansion; duty of engines; factor of safety; and 1,001 other things; and everything is plain and simple not the hardest way to figure, but the easiest. Second edition. Price, 75 cents STEAM HEATING and VENTILATING Practical Steam, Hot-Water Heating and Ventilation. By A. G. KING. This book has been prepared for the use of all engaged in the business of steam, hot-water heating and ventilation. 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 vacuum-vapor 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. Second edition. 367 pages, 300 detailed engravings. Cloth. $3.50 500 Plain Answers to Direct Questions on Steam, Hot-Water, Vapor and Vacuum Heating Practice. By ALFRED G. KING. This work, just off the press, is arranged in question and answer form; it is intended as a guide and text-book for the younger inexperienced fitter and as a reference book for all fitters. All long and tedious discussions and descriptions formerly considered so important have been eliminated, and the theory and laws of heat and the various old and modern methods and appliances used for heating and ventilating are treated in a concise manner. This is the standard Question and Answer examination book on Steam and Hot Water Heating, etc. 200 pages, 127 illustrations. Octavo. Cloth, Price, $2.00 STEEL Hardening, Tempering, Annealing and Forging of Steel. By J. V. WOODWORTH. A 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 |