This is the epoch of electricity, and of the utilization of all the great forces of Nature that have been right here to our hands since the world began, but which it has taken all these thousands of years to discover and analyze. More and more man is coming to see that Nature's own forces will carry on the big works of the world, if they are properly led through an understanding of their laws. We have aviation because man learned how to utilize the fact that air gives support; we have wireless telegraphy, and we will have the wireless transmission of power, because man learned that Nature has her own perfect system of carrying electrical currents when they are properly delivered to her, without any cumbersome system of wires; we have the Tesla turbine because its inventor found out that Nature gave steam, gas, water, and even air, certain properties that are intangible, and yet stronger far than mere brute force; and so it goes: Ever a greater familiarity with Nature leads to greater progress, and a happier, more interesting world. THE END Transcriber's note: Minor spelling inconsistencies, mainly hyphenated words, have been harmonized. Obvious typos have been corrected. A "List of Diagrams" section has been added as an aid for the reader. The tables in Chapter II have been split in order to meet width of line requirements. The first column has been duplicated in the second half of each table. End of Project Gutenberg's The Boy's Book of New Inventions, by Harry E. Maule