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'TAE MarRINE. REVIEW MARINE REVIEW COURSE FINDER Contains All the True and Mean Correct Magnetic Courses; True and Correct Mag- netic Bearings of the River and Harbor Lighted and Unlighted Ranges for All the Lakes; also a Simple Method for Shaping and Making These Courses by any Compass and for Any Boat. A volume that is new and original. Not to be com- pared with anything now on the market. A book that is of practical need. Can be used on every boat and at every hour of the day. Contains no dry nursing like uther publications with similar titles. No other work can take its place Itis the only work of its kind. No master, mate or sailor should be without it, It will save you much anxiety and relieve you of much responsibility. It might be the means of keeping your boat off the rocks and the saving of dry dock bills. It is easily understood and thoroughly practical. Is correct both theoret- ically and practically. By CLARENCE E. LONG. The MARINE REVIEW COURSE FINDER is a book that should interest every master, mate and sailor on the Great Lakes. It should be particularly interest- ing on account of its great practical utility and the simple manner in which it can be used. It will be found to be the greatest help and aid to any man who is in command, or on whom the shaping and setting of courses devolves. It answers the same purpose on the smal] boat as on the large boat. In fact, it applies wherever lake navigation is appli- cable. We send this book on approval to responsible parties. Price $2.50 BOOK DEPARTMENT PENTON PUBLISHING CO. CLEVELAND gs) Look at this Ch Wall D Lb Automatic w meets the approval of every engineer. The illustration shows the construction aged afd 18 most convincing evidence why it meets the needs of the steam user better than any other. Every part is accessible and easily cleaned. All parts are inter- changeable. Duplicate parts can be quickly fur- nished and put in by the user. And don't forget that each U. S. Injector is guar- anteed up to the U.S. Standard--z00 percent efficient. That's why it has the practica) endorsement of the U. S. Government and over 300,000 engineers. Engineer's Red Book free on request. If you are a steam user you want this valuable book. Postal request brings it free of charge. Write now. / AMERICAN INJECTOR CO., Detroit, Mich. .,. Manufacturers of "Moon" Automatic Grease Cups Never Fail" Crank Pin Oilers and a full line of Water Heaters, Ejectors, Fire Plugs, etc. Branches ;-- ; LONDON, ENG. WHYdHESITATE On the Choice Made by 500,000-Engineers? YOU CANNOT MAKE A MISTAKE. Catalog No. 23 Contains Full Information. PENBERTHY INJECTOR COMPANY, Largest Injector Manufacturers in the World. Detroit, Mich., U.S. A NEW YORK,.N.Y. CANADIAN FACTORY, Windsor, Ontario, Can. WJ. Injector.