CHAPTER I.
CHAPTER I.
Containing an introductory glance at some of the different Theories and Opinions which have been embraced respecting the formation of the Earth, and the reception which those Theories met with from the world when first promulgated.
CHAPTER II.
CHAPTER II.
Symmes's Theory; comprehending his description of the form of the earth, and of the other orbs in the Universe; his principles of gravity, and the points wherein he differs from the old or generally received theories.
CHAPTER III.
CHAPTER III.
Symmes's Theory supported by arguments drawn from the principles inherent in matter, and the consequences resulting from motion; tending to show that, from necessity, matter must form itself into concentric circles or spheres, such as Symmes describes the earth to be composed of.
CHAPTER IV.
CHAPTER IV.
Arguments in support of Symmes's Theory, drawn from Celestial appearances.
CHAPTER V.
CHAPTER V.
The Theory of Concentric Spheres, supported by arguments drawn from Terrestrial facts; such as the migration of animals to and from the arctic regions, andfrom refraction, and the variation of the compass, observed in high northern latitudes.
CHAPTER VI.
CHAPTER VI.
Facts tending to illustrate and prove the existence of amid-plane space, situated between the concave and convex surfaces of the sphere.
CHAPTER VII.
CHAPTER VII.
Several objections, made to the Theory of Concentric Spheres, answered, particularly the one that it contravenes religious opinions; demonstrating that the earth, and the other orbs of the universe, are formed on the best possible plan for the maintenance and support of organic life.
CHAPTER VIII.
CHAPTER VIII.
General observations on the Theory of Concentric Spheres, with a few suggestions to the Congress of the United States, to authorize and fit out an Expedition for the discovery of the Interior Regions; or, at least, to explore the northern parts of the continent of America.
CHAPTER IX.
CHAPTER IX.
A few brief suggestions, relative to the description, tonnage, and number of vessels, necessary to be equipped for a voyage of discovery to the interior regions of the earth; the number of men necessary to be employed on board, articles necessary for the outfit, and the probable expense attending the same; also, as to the route most proper to be pursued to accomplish the object of the expedition.
CHAPTER X.
CHAPTER X.
A short Biographical sketch of Captain Symmes; with some observations on the treatment which he has met with in the advancement of his theory.