distance of eleven miles, its diameter was five hundred and twenty-eight feet; and if only one mile off, it must have been forty-eight feet in diameter. These considerations leave no doubt that many of the meteors were of great size, though it may be difficult to say precisely how large. say precisely how large. The fact that they were stopped by the resistance of the air, proves that their substance was light; still, the quantity of smoke, or residuum, which resulted from their destruction, indicates that there was quite a body of matter.

The momentum of even light bodies of such size, and in such numbers, traversing the atmosphere with such astonishing velocity, must have produced extensive derangements in the atmospheric equilibrium, as the consideration of certain points will show.

These large bodies were stopped in the atmosphere, only by transferring their motion to columns of air, large volumes of which would be suddenly and violently displaced. Cold air of the upper regions would be brought down to the earth; the portions of air incumbent over districts of country remote from each other, being mutually displaced, would exchange places, the air of the warm latitudes being transferred to colder, and that of cold latitudes to warmer regions; remarkable changes of season would be the consequence, and numerous and violent gales would prevail for a long time, until the atmosphere should have regained its equilibrium. That the state of the weather, and the condition of the seasons that followed the meteoric shower, corresponded to these consequences of the disturbance of the atmospheric equilibrium, is a remarkable fact, and favors the opinion early suggested, that such disturbance is a natural effect of the meteoric shower, and it is a consequence from which the most formidable dangers attending phenomena of this kind are to be apprehended.

With regard to the nature of the meteors, Dr. Olmsted, after establishing the fact that they were combustible, light, and transparent bodies, infers that the

cloud which produced the fiery shower, consisted of nebulous matter, analogous to that which composes the tails of comets. It cannot be said, indeed, precisely what is the constitution of the material of which the latter are composed; but it is known that it is very light, since it meets no appreciable force of attraction on the planets, moving even among the satellites of Jupiter without disturbing their motions, although its own motions, in such cases, are greatly disturbed, thus proving its materiality; and, that it is exceedingly transparent, is evinced by the fact that the smallest stars are visible through it. Hence, so far as there can be gathered any knowledge of the material of the nebulous matter of comets, and of the matter composing these November meteors, they appear to be analogous to each other.

Various hypotheses have been proposed to account for this wonderful phenomenon. The agent most readily suggesting itself in this and in most other unexplained natural appearances-electricity-has no known properties adequate to account for the production of the meteors, for the motions which they exhibited, or for the trains which, in many instances, they left behind them. And, if this agent be supposed to have some connection with the light and heat which they exhibited, it is to be borne in mind, that the compression of the air which must result from the rapid progress of large bodies through it, is a sufficient cause of this.

Magnetism has also been assigned as the principal agent concerned in producing the meteoric shower. The aurora borealis, and the remarkable auroral arches which occasionally appear in the sky, have been found to have peculiar relations to the magnetism of the earth, arranging themselves in obedience to the laws of magnetic attraction. Something of this kind was supposed by some to appear during the meteoric phenomenon, especially in the position of the apparent center or radiantpoint, which was, as noticed by many observers, very nearly in the place towards which the dipping-needle is directed.

From other observations, however, it appears that the radiant-point was not stationary with respect to the meridian, but accompanied the stars in their westerly progress; the apparent coincidence with the pole of the dipping-needle being, according to this, purely accidental.

According to the view that has been taken, by some, of the origin of meteoric stones, namely, that of ascribing them to terrestrial comets, the hypothesis has been suggested, that the meteors in question might have a similar origin. But the body which afforded the meteoric shower, could not have been of the nature of a satellite to the earth, because it remained

so long stationary with respect to the earth at least two hours,-a period sufficient to have carried it nearly round the earth in a circular orbit.

Nor can it be supposed that the earth, in its annual progress, came into the vicinity of a nebula, which was either stationary, or wandering lawless through space. Such a collection of matter could not remain stationary within the solar system, in an insulated state; and had it been in motion in any other direction than that in which the earth was moving, it would soon have been separated from the earth, since, during the eight hours while the meteoric. shower lasted, and perhaps, in all its

wide range, it lasted much longer,-the earth moved in its orbit through the space of nearly five hundred and fifty thousand miles.

In connection with the account of this meteoric shower, mention may be made of a remarkable light, seen in the east at the time of that great display, and subsequently in the west after twilight at different times, until the month of May, which light assumed different aspects, corresponding, apparently, to those which the body revolving around the sun, in the manner contemplated by theory, would occupy. Hence it was conjectured, that this luminous appearance proceeded from the body itself, which afforded the meteoric shower. It has also been suggested, that this light may result from the same cause as the zodiacal light, and that the latter interesting phenomenon perhaps results from a nebulous body revolving around the sun, interior to the orbit of the earth.

It is a point worthy of contemplation, namely, the direful effects which such a "fiery shower" might, in the absence of that law of harmony which governs the universe, have unquestionably produced. Had the meteors been constituted of materials a little more dense, their momentum would have enabled them to reach the earth; and had they held on their course three seconds longer, it is impossible to conceive of the calamities which would have ensued by the descent to the earth of bodies of such magnitude, glowing with the most intense heat. Half the continent must have been involved in one common destruction!

One of the most interesting facts pertaining to this grand celestial phenomenon, is its periodical character. Between the years 903 and 1833, of the modern era, thirteen of these great showers are recorded, separated from each other by intervals of thirty-three and sixty-six years. It is not a little remarkable, too, that the epoch of these periodic displays coincides with the annual November showers so familiar in their occurrence to all, and

that their point of divergence in the heavens is the same. Indeed, the phenomenon of the long interval or period differs from that of the annual period only in its numerical character.

The last of these magnificent stellar showers-second, perhaps, in grandeur of demonstration to that of November, 1833, which latter stands solitary in its unsurpassed extent and splendor, — occurred November fourteenth, 1867, beginning at about three o'clock in the morning. At half-past three, a meteor of a greenish blue color, and about the size of a star of the first magnitude, shot out from the direction of the constellation Leo, lighting up the sky with a long train of crimson fire, and traveling in a north-westerly direction. It had scarcely faded from the sight, when another and equally brilliant, though not quite so large, came speeding along in its track, and it was followed by fourteen of smaller magnitude, one by one, in quick succession. At this moment a heavy cloud drifted towards the north, and for some minutes the spectacle was partially lost to view. That the meteors were falling rapidly, however, was plainly evident; for, from all points where the mass of clouds was thin, occasional meteors flashed out, and the frequent lighting up of the clouds, as they passed over, left no doubt that the mysterious phenomenon was having full play in the regions beyond.

At ten minutes before four o'clock, the northern sky again became clear; a thick and almost impenetrable cloud passed over the moon, partially obscuring its light, and thus enabling the observers to view with greater distinctness the size and brilliancy of the meteors.

The display was now a most magnificent one indeed. The meteors shot out from Leo in all directions, and with remarkable swiftness traveled across the horizon. Sixty-three were counted in one minute and ten seconds, of which three were of extraordinary size and beauty. One of these, of a greenish hue, and followed by a long train of the same color, traveled in the direction of Ursa Major,

and as it was disappearing in the southern horizon, apparently burst, lighting up the sky for a great distance on all sides. It soon became utterly impossible to keep any correct account of the number falling. Eight, ten and twelve sped onwards, on their erratic course, at the same moment, scarcely disappearing before others of equal splendor took their places. For fully twenty minutes they continued to fall with the same rapidity, during which time, there were counted, exclusive of those already mentioned, three hundred and thirteen. This number, however, was not one-fifth of that which really fell, a observed in New York city. Not less than fifteen hundred or two thousand were estimated by observers at that city, to have radiated from Leo, during this space of time, some of which were splendid in color and movement.

One of the meteors constituting this display is described as of surpassing beauty, size and brilliancy. It radiated from Leo, and took a direct northerly course toward Ursa Major, followed by a long train of a yellowish red hue, which spanned the horizon from its point of appearance to that of its disappearance. This meteor was of the same greenish blue color as the others which preceded it,

and as it passed over about one-half of the course traversed, it seemed to burst, and then the spectacle was one of extreme beauty. Apparently, hundreds of fragments of an almost blood-red color broke from it and scattered in every direction, while it continued its course towards the north, no longer wearing its greenish-blue color, but of one uniform and beautiful blue. The panorama it presented was exceedingly grand, and lasted about three minutes, before the varied colors disappeared and the fire-lit skies resumed their wonted serenity. After the appearance of this, the display gradually died away.

Although it is doubtful, from the want of the requisite data, whether the source of the meteors, or the height of the meteoric cloud, has been accurately ascertained, yet the truth in regard to the latter may be approximated. According to the established laws of falling bodies, the velocity the meteors would acquire in falling from a point two thousand two hundred and thirty-eight miles above the earth to within fifty miles of its surface-this being considered as nearly the height of the atmosphere-is about four miles per second, which is more than ten times the maximum velocity of a cannon-ball, and about nineteen times that of sound'