They had uncovered what seemed to be the side of a large coloured globule embedded in the substance. The colour, which resembled some of the bands in the meteor's strange spectrum, was almost impossible to describe; and it was only by analogy that they called it colour at all. Its texture was glossy, and upon tapping it appeared to promise both brittle ness and hollowness. One of the professors gave it a smart blow with a hammer, and it burst with a nervous little pop. Nothing was emitted, and all trace of the thing vanished with the puncturing. It left behind a hollow spherical space about three inches across, and all thought it probable that others would be discovered as the enclosing substance wasted away.