their electric condition, are more or less impervious to it—antapergic. Its power of penetration diminishes under a very obscure law, but so rapidly that no conceivable strength of current would affect an object protected by an intervening sheet half an inch in thickness. On the other hand, it prefers to all other lines the axis of a conductive bar, such as may be formed of [undecipherable] in an antapergic sheath. However such bar may be curved, bent, or divided, the current will fill and follow it, and pursue indefinitely, without divergence, diffusion, or loss, the direction in which it emerges. Therefore, by collecting the current from the generator in a vessel cased with antapergic material, and leaving no other aperture, its entire volume might be sent into a conductor. By cutting across this conductor, and causing the further part to rotate upon the nearer, I could divert the current through any required angle. Thus I could turn the repulsion upon the resistant body (sun or planet), and so propel the vessel in any direction I pleased.
I had determined that my first attempt should be a visit to Mars. The Moon is a far less interesting body, since, on the hemisphere turned towards the Earth, the absence of an atmosphere and of water ensures the absence of any such life as is known to us—probably of any life that could be discerned by our senses—and would prevent landing; while nearly all the soundest astronomers agree in believing, on apparently sufficient grounds, that even the opposite hemisphere [of which small portions are from time to time rendered visible by the libration, though greatly foreshortened and comsequently somewhat imperfectly seen] is equally devoid
