The soft whirr of the disintegrator in the hands of Mr. Edison standing near me came to my ears through the telephonic wire. He quickly swept the concentrating mirror a little up and down, and instantly the foremost Martian vanished! Part of some metallic dress that he wore fell upon the ground where he had stood, its vibratory rate not having been included in the range imparted to the disintegrator. His followers paused for a moment, amazed, stared about as if looking for their leader, and then hurried back to their projectile and disappeared within it. "Now we've got business on our hands," said Mr. Edison. "Look out for yourselves." As he spoke, I saw the death-dealing knob of the war engine contained in the car of the Martians moving around toward us. In another instant it would have launched its destroying bolt. Before that could occur, however, it had been dissipated into space by a vibratory stream from a disintegrator. But we were not to get the victory quite so easily. There was another of the war engines in the car, and before we could concentrate our fire upon it, its awful flash shot forth, and a dozen of our comrades perished before our eyes. "Quick! Quick!" shouted Mr. Edison to one of his electrical experts standing near. "There is something the matter with this disintegrator, and I cannot make it work. Aim at the knob, and don't miss it." But the aim was not well taken, and the vibratory force fell upon a portion of the car at a considerable distance from the knob, making a great breach, but leaving the engine uninjured. A section of the side of the car had been destroyed, and the vibratory energy had spread no further. To have attempted to sweep the car from end to end would have been futile, because the period of action of the disintegrators during each discharge did not exceed one second, and distributing the energy over so great a space would have seriously weakened its power to shatter apart the atoms of the resisting substance. The disintegrators were like firearms, in that after each discharge they must be readjusted before they could be used again. Through the breach we saw the Martians inside making desperate efforts to train their engine upon us, for after their first disastrous stroke we had rapidly shifted our position. Swiftly the polished knob, which gleamed like an evil eye, moved round to sweep over us. Instinctively, though incautiously, we had collected in a group. A single discharge would sweep us all into eternity. "Will no one fire upon them?" exclaimed Mr. Edison, struggling with the disintegrator in his hands which still refused to work.