Every boy—and many a girl, too—likes to make things, and it is out of this certain interest which youth has in invention that this book has grown. Its appeal is primarily to the inventive faculty latent in every youngster. Not only does Mr. Darrow describe the great inventions of man, but he applies the principles underlying them to simple apparatus which the boy can construct for himself. The aëroplane, the balloon, the various kinds of engines, the telephone, the telegraph, the submarine, the telescope—all these and many more come in for consideration, followed in each case with simple experiments which the reader can make for himself, and in many cases with explicit directions for the construction of an adaptation of the machine or instrument. Stephen’s Last Chance By MARGARET ASHMUN Illustrated, $1.30 Here’s a little boy, alone and friendless, in Last Chance Gulch. His aunt, who was his only relative, has just died. The future looks pretty dark to him—and that is where the story begins. What happens to Stephen after Emery and Sara Clark take him back to their ranch out in the wildest part of Montana, how he rides the bucking “Scratch Gravel,” helps to capture the bank robbers, and how he saves Emery Clark’s life by doing a very brave (and hard) thing, and best of all, how he takes his “last chance,” is told in the most interesting and exciting way. Boys will like this book immensely because it is full of adventure and something happens on every page. What happens? Well—that’s telling! THE MACMILLAN COMPANY Publishers 64-66 Fifth Avenue New York