darkened room. I knew there was something visible in my view, but my eyes did not seem able to receive the impressions. I realize now they were not yet adjusted to the new form of light. Gradually, as I looked, objects of definite shape began to emerge from the blackness.

"Gentlemen, I want to make clear to you now—as clear as I can—the peculiar aspect of everything that I saw under this microscope. I seemed to be inside an immense cave. One side, near at hand, I could now make out quite clearly. The walls were extraordinarily rough and indented, with a peculiar phosphorescent light on the projections and blackness in the hollows. I say phosphorescent light, for that is the nearest word I can find to describe it—a curious radiation, quite different from the reflected light to which we are accustomed.

"I said that the hollows inside of the cave were blackness. But not blackness—the absence of light—as we know it. It was a blackness that seemed also to radiate light, if you can imagine such a condition; a blackness that seemed not empty, but merely withholding its contents just beyond my vision.

"Except for a dim suggestion of roof over the cave, and its floor, I could distinguish nothing. After a moment this floor became clearer. It seemed to be—well, perhaps I might call it black marble—smooth, glossy, yet somewhat translucent. In the foreground the floor was apparently liquid. In no way did it differ in appearance from the solid part, except that its surface seemed to be in motion.

"Another curious thing was the outlines of all the shapes in view. I noticed that no outline held steady when I looked at it directly; it seemed to quiver. You see something like it when looking at an object through water—only, of course, there was no distortion. It was also like looking at something with the radiation of heat between.

"Of the back and other side of the cave, I could see nothing, except in one place, where a narrow effulgence of light drifted out into the immensity of the distance behind.

"I do not know how long I sat looking at this scene; it may have been several hours. Although I was obviously in a cave, I never felt shut in—never got the impression of being in a narrow, confined space.

"On the contrary, after a time I seemed to feel the vast immensity of the blackness before me. I think perhaps it may have been that path of light stretching out into the distance. As I looked it seemed like the reversed tail of a 

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