General Books, Memphis, TN, 2010, reprint of 1914 edition, printed on demand.  ISBN 978-1-153-77242-6.  Trade soft cover, 70 pages.  Very good plus; faint creases along front spine edge; interior clean and unmarked; NO illustrations have been included in this reproduction.  ‘… I have made practice and work the predominating factors.  It has been my aim to suggest the best form in which to do the things in a practical way, and from that work, as the boy carries it out, to deduce certain laws and develop the principles which underlie them.  Wherever it is deemed possible to do so, it is planned to have the boy make these discoveries for himself, so as to encourage him to become a thinker and a reasoner instead of a mere machine.’ (from Introduction)