See What You Buy!! We send any MECHANICAL book COSTING A DOLLAR or more, on approval, anywhere in North America The Instruction is under the direction of prominent teachers in Columbia University, University of Chicago, University of Illinois, Simmons College, Lewis Institute, etc. Sample Lesson Booklet WANTED-Position as Architectural Draftsman is wanted by a High School graduate. Has been one year at Pratt Institute. Experienced in drafting, keeping of engineering records, time keeping, etc. Best of references. Address The Technical World, No. 283. If you will send us the names of three friends whom you know to be interested and two 2-cent stamps for postage, we will mail you the first lesson on "Chemistry of the Household," an illustrated 64-page booklet, especially prepared for our students by Margaret E. Dodd, S. B.,Grad. Mass. Inst. Technology, containing interesting non-technical treatise on Chemistry of Water, Air, Fire and Fuel; Chemical Composition and Changes; Food and its Functions; Starches and Sugars; Chemistry of Bread Making; Composition and Use as Food-of Carbohydrates, Fats, Proteids, Casein, Gluten, etc., Chemistry of Digestion, Chemistry of Cooking, etc., etc. We will also send our 48-page iliustrated Catalogue A giving full synopses of all subjects. American School of Household Economics 3311 Armour Avenue : : : CHICAGO, ILL. : WANTED Position by a man who has had several years' experience in wiring for light and power-care of 30-K. W. generator and small motor. Student of the American School of Correspondence. Fine references from present employer. Address The Technical World, No. 272. Poor Richard's Wit THEN BENJAMIN FRANKLIN was dining, some one said: WH "Here are three nationalities represented. I am French; my friend here is English; and Mr. Franklin is American. Let each propose a toast." The Englishman arose, and in the tone of a Briton bold said: "Here's to Great Britain, the sun that gives light to the nations of the earth!" The Frenchman was rather taken back at this, but he proposed: "Here's to France, the moon whose magic rays move the tides of the world!" Franklin then rose, and with an air of quaint modesty said: "Here's to George Washington, the Joshua of America, who commanded the sun and moon to stand still-and they stood still!" Each in His Degree He carried the chain to the farmer's fence. THERE WILL SHORTLY BE a great boom in gas engines. The presidential campaign is on. Mention The Technical World. Prepares for the bar of any State. Combines theory and practice. Text books same as used in resident law schools. Teaches law at your home, without taking you from your regular vocation. WE OFFER THREE COURSES Regular college course, leading to degree; post-graduate and business law courses. The only correspondence law school having the hearty endorsement of the bench and bar. RESULTS are the supreme test of the efficiency of any system of instruction. In no instance has a graduate of our school failed in an examination for admission to the bar. Our graduates are successful in practice, many having achieved distinction at the bar and won political honors. THE STUDY OF LAW is not confined to those who wish to practice. We have hundreds studying for a more liberal education and for business. It trains the mind to accurate and logical thinking and gives one a broader and more comprehensive outlook on life. It cultivates habits of clearness of thought, brevity of expression, mental alertness, and makes men careful in what they undertake. Tuition Cheerfully Refunded if you are not satisfied with the course. HEATING-VENTILATIN^ -PLUMBING Original Articles Every Month by Experts LITERATVRE REVIEWS MAGAZINES BOOKS Books Received Modern Practical Electricity. By R. Mullineux Walmesley. 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 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. Stair Building Made Easy. By Fred T. Hodgson. Pages 160. Cloth. The Industrial Publication Company, New York. Price, $1.00. AS THE AUTHOR SAYS in the preface, most books on this subject are too ex 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 information from the beginning, and at a price within the means of the poorest apprentice. 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 Instruction, 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, Št. Louis, and San Francisco. Price, $1.00. AMONG NEW PUBLICATIONS in technical educational literature, this little book is timely and welcome. It covers thoroughly the most important constructions |