Book I. Secrets of Space

CHAPTER I. DR. HERMANN ANDERWELT 19 II. THE GRAVITY PROJECTILE 27 III. STRUCTURE OF THE PROJECTILE 37 IV. WHAT IS ON MARS? 48 V. FINAL PREPARATIONS 57 VI. FAREWELL TO EARTH 67 VII. THE TERRORS OF LIGHT 81 VIII. THE VALLEY OF THE SHADOW 91 IX. TRICKS OF REFRACTION 99 X. THE TWILIGHT OF SPACE 108 XI. TELLING THE TIME BY GEOGRAPHY 117 XII. SPACE FEVER 126 XIII. THE MYSTERY OF A MINUS WEIGHT 141