My ears were roaring, the room seemed whirling, but in a moment that passed. I felt a sudden growing sense of lightness. A humming was within me--a soundless tingle. The drug had gone to every tiny microscopic cell in my body. The myriad pores of my skin seemed thrilling with activity. I know now that it was the exuding volatile gas of this disintegrating drug. Like an aura it enveloped me, acted upon my garments. I learned later much of the principles of this and its companion drug but I had no thought for such things now. The huge dimly illumined room under the dome was swaying. Then abruptly it steadied. The strange sensations within me were lessening, or I forgot them, and I became aware of externals. The room was shrinking! As I stared, not with horror now, but with amazement and a coming triumph, I saw everywhere a slow, steady, crawling movement. The whole place was dwindling. The platform, the microscope, were nearer than before, and smaller. The pile of ingots, and men near there, were shifting toward me. "George! My God--this is weird!" I saw Alan's white face as I turned toward him. He was growing at the same rate as myself evidently, for in all the scene he only was unchanged. We could feel the movement. The floor under us was shifting, crawling slowly. From all directions it contracted as though it was being squeezed beneath us. In reality our expanding bodies were pushing outward. The pile of boxes which had been a few feet away, were thrusting themselves at me. I moved incautiously and knocked them over. They seemed small now, perhaps half their former size. Glora was standing behind them. I was sitting and she was standing, but across the litter our faces were level. "Stand up!" she murmured. "You all right now. I hide!" I struggled to my feet, drawing Alan up with me. Now! The time for action was upon us! We had already been discovered. The men were shouting, clambering to their feet. Alan and I stood swaying. The dome-room had contracted to half its former size. Near us was a little platform, chair and microscope. Small figures of men were rushing at us. I shouted, "Alan! Watch yourself!" We were unarmed. These men might have automatic weapons. But evidently they did not. Only knives were in their hands. The whole place was ringing with shouts. And then a shrill siren alarm from outside started clanging. The first of the men--a few moments before he had seemed a giant--flung himself upon me. His head was lower than my shoulders. I met him with a blow of my fist in his face. He toppled backward; but from one side another figure came at me. A knife-blade bit into the flesh of my thigh. The pain seemed to fire my brain. A madness descended upon me. It was the madness of abnormality. I saw Alan with two dwarfed figures clinging to him. But he threw them off, and they turned and ran.