For the whole world of living things had been overtaken by the same tide of insensibility; in an hour, at the touch of this new gas in the comet, the shiver of catalytic change had passed about the globe. They say it was the nitrogen of the air, the old _azote_, that in the twinkling of an eye was changed out of itself, and in an hour or so became a respirable gas, differing indeed from oxygen, but helping and sustaining its action, a bath of strength and healing for nerve and brain. I do not know the precise changes that occurred, nor the names our chemists give them, my work has carried me away from such things, only this I know—I and all men were renewed. I picture to myself this thing happening in space, a planetary moment, the faint smudge, the slender whirl of meteor, drawing nearer to this planet,—this planet like a ball, like a shaded rounded ball, floating in the void, with its little, nearly impalpable coat of cloud and air, with its dark pools of ocean, its gleaming ridges of land. And as that midge from the void touches it, the transparent gaseous outer shell clouds in an instant green and then slowly clears again. . . . Thereafter, for three hours or more,—we know the minimum time for the Change was almost exactly three hours because all the clocks and watches kept going—everywhere, no man nor beast nor bird nor any living thing that breathes the air stirred at all but lay still. . . . Everywhere on earth that day, in the ears of every one who breathed, there had been the same humming in the air, the same rush of green vapors, the crepitation, the streaming down of shooting stars. The Hindoo had stayed his morning’s work in the fields to stare and marvel and fall, the blue-clothed Chinaman fell head foremost athwart his midday bowl of rice, the Japanese merchant came out from some chaffering in his office amazed and presently lay there before his door, the evening gazers by the Golden Gates were overtaken as they waited for the rising of the great star. This had happened in every city of the world, in every lonely valley, in every home and house and shelter and every open place. On the high seas, the crowding steamship passengers, eager for any wonder, gaped and marveled, and were suddenly terror-stricken, and struggled for the gangways and were overcome, the captain staggered on the bridge and fell, the stoker fell headlong among his coals, the engines throbbed upon their way untended, the fishing craft drove by without a hail, with swaying rudder, heeling and dipping. . . .