This theory, as I understand Dr. Ure’s view, has _two_ advantages, and _three_ disadvantages. It accounts for the production of light on the _first_ day, as Moses says. It also accounts for the _artificial production_ of light by friction between bodies which have never been exposed to solar light, by combustion, compression, &c. For though it supposes light “subsequently condensed” in the sun, I presume it does not suppose _all_ the light thus transferred from the earth, and condensed: much of it is latent, and combined with other substances, from which it is evolved by friction, combustion, compression, &c. But this ingenious theory, which is mentioned by our author, and attributed to Dr. Wall, is pressed with _three_ difficulties: 1. It does not suppose the existence of the sun until the _fourth_ day, and of course no common centre of attraction to the earth and other planets. But it is impossible to conceive of the _safe existence_ of the planets _previous_ to the existence of their common center, which now regulates their order and motion. This is an insuperable difficulty, unless we resort to a “particular act of Almighty Power.” 2. If the body of the sun be “condensed light,” _abstracted_ from the earth, the scene of its creation, then we must suppose that _a body more than a million times greater than the earth was drawn off from it_, which indeed would require an “act of Almighty Power,” and is utterly irreconcilable to the laws of attraction. 3. This view also destroys the idea of the sun’s being an opake and habitable globe, unless we could conceive the inhabitants capable of dwelling in “condensed light;” which supposition is at variance with all our ideas of rational existence. Hence it robs the mind of the pleasing and almost intuitively correct idea of the sun’s being a habitable globe. These difficulties appeared so great that others, and particularly Dr. Adam Clarke, have offered a new mode of interpretation, founded on the Newtonian theory as improved by Dr. Herschell. Dr. Clarke supposes that _caloric_, or latent heat, was produced on the first day, when God said, “let there be light; and there was light.” In this case he considers that latent heat and latent light are, probably, the same: or that it is the same subtile substance diffused throughout creation, which is capable of producing heat and light, when properly excited.