Thus discussion, researches into the past, calculations, conjectures succeeded each other. But that which made the deepest impression on every mind was first that, as proved by observation, the present comet had a nucleus of considerable density, and second, that carbonic-oxide gas was unquestionably the chief chemical constituent. Fear and terror resumed their sway. Nothing else was thought of, or talked about, but the comet. Already inventive minds sought some way, more or less practicable, of evading the danger. Chemists pretended to be able to preserve a part of the oxygen of the atmosphere. Methods were devised for the isolation of this gas from the nitrogen and its storage in immense vessels of glass hermetically sealed. A clever pharmacist asserted that he had condensed it in pastilles, and in a fortnight expended eight millions in advertising. Thus commerce made capital out of everything, even universal death. All hope was not, however, abandoned. People disputed, trembled, grew anxious, shuddered, died even—but hoped on.

The latest news was to the effect that the comet, developing, as it approached the thermal and electric influences of the sun, would have at the moment of impact a diameter sixty-five times that of the earth, or 828,000 kilometers.

It was in the midst of this state of general anxiety that the session of the Institute, whose utterance was awaited as the last word of an oracle, was opened.

The director of the observatory of Paris was naturally to be the first speaker; but what seemed to excite the greatest interest in the public was the opinion of the president of the academy of medicine on the probable effects of carbonic-oxide. The president of the geological society of France was also to make an address, and the general object of the session was to pass in review all the possible ways in which our earth might come to an end. Evidently, however, the discussion of its collision with the comet would hold the first place.

FRIGHTENED WATCHERS.

As we have just seen, the threatening star hung above every head; everybody could see it; it was growing larger day by day; it was approaching with an increasing velocity; it was known to be at a distance of only 17,992,000 kilometers, and that this distance would be passed over in five days. Every hour brought this menacing hand, ready to strike, 149,000 kilometers nearer. In six days anxious humanity would breathe freely—or not at all.

A GROUP OF LISTENERS.

CHAPTER III.