At the same time so many mechanics are accustomed to perform soldering operations with poorly prepared tools and with appliances which might be greatly improved upon, that the author is led to offer this book in the hope that it will serve as a practical aid to improved methods, thereby serving the interests of mechanics who seek advancement as well as employers who are alert to the importance of efficiency and economy in the methods pursued in their establishments. Therefore the author has dwelt with considerable fullness upon the many phases of soldering and brazing, giving the results of experience and observation acquired through long practice and experiment in these channels.