In seconds Kashtanov's figure lost definite outline and assumed a ghostly transparency that bared the internal organs and veins: and then his skeleton appeared. Istafiev was facing the control panel. As he gathered his limbs for the decisive leap, Chris's eyes were on his stocky back. But Istafiev was watching keenly the gleaming, glassy dome above. He was surveying the action of the white substance and judging the time of the process by it. Then suddenly his vision centered on something that had seemed to move on the surface of the dome. Something had moved. Chris, lying against the wall behind, had opened his eyes fully, had dragged back his legs beneath him and balanced himself for his leap. And, in distorted perspective, his actions were reflected on the dome. Just for a second he poised--then sprang. The speed Istafiev showed seemed foreign to the build of his body. In an instant he had whirled from the switchboard, fingers not lingering to release Kashtanov, and leaped. * * * * * They met at the table. Two hands shot out for the gun lying on it. Chris grabbed it first. But he paid for his speed. The swipe he had aimed with his left arm went wild; a fist thudded into his stomach and belted the wind from him, and he felt his gun-wrist seized and wrenched back. Gasping for breath, dizzy, only the fighting instinct enabled him to crane a leg behind the other and throw his whole weight forward. The planks of the floor shivered under the two bodies that toppled onto them. There was a melee on the floor, furious, savage, mad. In cold fact, it lasted merely for seconds; but Chris was grappling with a man whose strength was as desperate as his own, and who had not been weakened by a solar plexus blow or a cramping wait of hours in one position: the American had passed through an eternity of physical and mental agony when Istafiev, hunching up, strained the finger of his right hand upward, searching for the gun trigger. One stubby finger found it. Istafiev grunted. The gun trembled from the force of the hands disputing its direction; then its ugly snout, stuck out parallel to the floor, and began to creep slowly downwards as Istafiev bore on it with all his might. "So!" he hissed. "It was clever, your little game, but it iss finished!" But Chris, undermost, had braced his elbow on the floor. The gun held. Every ounce of his strength went into holding that one position, into keeping the weapon's muzzle away; he was therefore not prepared for Istafiev's sudden strategy. There was a quick pull, a tug. Istafiev had wrenched himself over, reversing their positions and dragging Chris uppermost--and, as the American's balance was destroyed, the gun whipped up and fired. A bullet sang past his head. It missed by inches. But from behind came a sound as of rending cloth. The glassy dome above the cage of the machine had splintered into countless fragments.