shall return to this subject. The immense distance at which objects are said to be seen occasionally in the polar regions, is another facts brought by our author in support of his theory. And if the fact be established that it exists in one case, is it not fair, nay, is it not almost a certain and necessary consequences, that the same laws of matter which formed one planet into concentric spheres, must form all the others. Our present earth is composed of the remains of the first; our continents and islands being portions of the primordial crust, from which the waters have retired. One of the favourite projects of the adherents of Symmes's theory, is the establishment of an expedition to explore the inner earth. Yet, such is the just destiny reserved fore all extravagent and romantic speculations, that, at the present day, they have not a single advocate or believer, and are mentioned only to be condemned. It is always sensibly circular. We are, therefore, utterly ignorant of the nature and composition of the interior of this immense mass, and must, perhaps, for ever remain. The last argument that we shall mention, (for it is time to bring this discussion to a close is contained in the following paragraph: "Those appearances observed in the southern hemisphere, which are termed Magellanic clouds, by navigators, have not, so far as I know. The subject is of too much interest, however, not to have excited the particular attention of philosophers, and, in the absence of facts, many of them have not hesitated to resort to speculation and conjecture. Hence when navigators arrive in the neighbourhood of the apparent verge, the variation of the needle is more or less reversed.
It appears that he fought barvely during the late war; and we are certainly not disposed to deny, that a very unsound philosopher, may be a gallant soldier and an estimable man. Let us hear, from the author himself, a statement of this famous theory. If we draw any conclusion, or form any opinion at all respecting the formation of the planets, whose inner parts we cannot see; or, if we form any opinion in relation to our own planet in particular, whose poles have never been explored, would not. These are the most remarkable theories that have been presented, on the subject of the structure of the earth. In every case, the earth must be a solid spheroid. (excerpts from American Quarterly Review Vol. This ellipticity is less than that which would correspond to a homogeneous earth, and shows that, far from being hollow, the density increases towards the centre. When the sun is on the tropic of Capricorn, the circle of greatest cold would be about twenty-three and a hald degrees south of the apparent verge, and when the sun is on the tropic of Cancer, this circle would probably be just under the.
John Cleves Symmes, Esq.
471 Captain Symmes again.
Captain Symmes theory of the earth is not quite so novel as is generally thought; the idea of the globe being hollow at the poles was suggestewd many years since.
Literary Analysis of Gone with the Wind.
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The newspapers have teemed gregors Transformation in The Metamorphosis with essays; circulars have been addressed to all the learned societies of Europe and America; addresses and petitions have been presented to our national and state legislatures; certificates of conviction and "ashesion" have been procured from men in high literary and. The disciples of Symmes believe that each sphere has a cavity, or mid-plane space, near the centre of the matter composing it, filled with a very light, subtile, elastic substance, partaking somewhat, perhaps, of the nature of hydrogen gas; which aerial fluid is composed. The migration of the animals of the arctic regions to the north in winter, and their return to the south in summer, is strongly asserted, and it is of course imagined that they retreat into the inner earth for comfortable quarters. The appearances of the sun and moon puzzle our system-maker, as well they may. The magnetic principle which gives polarity to the needle, is believed to be regulated by the polar openings, and that the nedle always points directly to the opening, and of course parallel to a line drawn perpendicular to the plane of the opening. A portion of the water, near the base, might therefore, if alone, be supported by the centrifugal force. But this notion is contradicted by the known laws of nature. The reasons in support of the theory, which are drawn from the mechanical properties of matter, are given in the third chapter; and, as might be supposed, our theorist places his great dependence on the centrifugal force arising from the earth's rotation about its axis. In the first place, then, we remark, that the fact of the earth's having a globular form, is string evidence that it must once have been composed of fluid, or, at least, of plastic materials.
Of these the most important is the measurement of different degrees of meridian, an operation which has been executed with great accuracy, at different points, from the equator, to nearly sixty-seven degrees of north latitude. Still it is very possible, that, in summer, the currents may carry the ice into lower latitudes, so as to leave the polar regions comparatively free.