In presenting to the plumbing fraternity successive editions of "Questions and Answers," the author has endeavored to keep pace with the advancement that is constantly being made, and to make each edition of greater value to his readers than the preceding edition has been. The original purpose to present the subject in as concise and brief and practical a manner as possible is still followed.

In the present edition, while some additions have been made to the body of the book, the principal additions are to be found in the appendix, and under the section devoted to "Practical Subjects." Under the latter has been added a considerable amount of information which should prove of much value to the workman in his daily work. It is the hope of the author that this edition may be received as cordially as have preceding editions.

Hartford, Conn., January, 1906.