On Zik decisive battles between nations are not fought by armies on land or navies on the sea, but by flying war ships called Flying Devils sailing in the air. A battle witnessed. Illustration. A practical way of settling the strife between capital and labor. The art of maintaining youthful vigor in old ago. CHAPTER XVII. The Diamond World. On the brightest planets of the universe diamonds are as plenty as soil is on our Earth, but soil is as scarce and valuable as diamonds are in our world. The heart-rending oppression of the "Soil Trust" in the Diamond World portrayed. Illustration. The insatiable greed of "Trusts" follows the poor people into their sepulchers. CHAPTER XVIII. Triumphant Feat of Orion. Description of a tunnel through the center of Holen, a globe 500 miles in diameter. Illustration of passenger car used. Its operation explained. CHAPTER XIX. The Mute World. Muteites have no audible language. They converse by pure thought transmission, and no one can conceal evil thoughts. When a Muteite criminal is brought before a Court of Justice the doors of his soul are unlocked so that all past thought-images, photographed on the sensitive living plates of his mind, are thrown open to view. No hypocrisy, no conventional lying. CHAPTER XX. Brief. The world of Brief sustains the shortest lived human beings of our universe. What we in our world crowd into seventy or eighty years of life the Briefites crowd into the narrow compass of about four years of our time. Journalism, footwear, raiment, transportation, public highways, business, religious life, etc., portrayed under such mad-rush environments. CHAPTER XXI. The Life on Wings. The inhabitants of Swift are charmingly beautiful, and many of them can be seen gracefully moving on wings through the air. A charming conversation with Plume, the most beautiful woman in the universe. Illustration. CHAPTER XXII. Heaven. Its greatness, permanency, inhabitants, degrees, seven typos of intelligences, unity, employments, transportation, sexual affinities, structural aspects, etc., uniquely portrayed. PREFACE. Any person having a reasonable education will admit that there are many planetary worlds besides the one on which we live. But whether or not they are inhabited is an open question with most people. We had been in doubt on this point for many years, but now we are settled in our conviction that human life exists in many different worlds of space. We can give no proof of this except that we have just returned from the greatest journey we ever took. We went from world to world over long distances of space as easily as one could go from place to place on the surface of our earth. _This was a journey of the soul_, for surely flesh and bone could not have traveled such amazing distances. At times we were lost to this world, being entirely absorbed in the glimpses of other worlds that were flashing upon our view in happy succession.