To show that inventors have accomplished more than most persons realize, not only in bringing forth new mechanisms, but in doing creative work in many walks of life, is, in part, the object of this book. To suggest what they may do, if properly encouraged, is its main intention. For, since it is to inventors mainly that we owe all that civilization is, it is to inventors mainly that we must look for all that civilization can be made to be.

The mind of man cannot even conceive what wonders of beneficence inventors may accomplish: for the resources of invention are infinite.

The author is indebted to Ginn & Company, Boston, for the use of illustrations from "General History for Colleges and High Schools," by Philip Van Ness Myers, and "Ancient Times, A History of the Early World," by James Henry Breasted, and to George H. Doran Company, New York, for the use of a map from "A History of Sea Power," by William Oliver Stevens and Allan Westcott.