If this hypothesis were accepted, what magnificent, what sublime relations existing between the sun and the globes which gravitate around him, would be revealed to us! A continual exchange would be established between the sun and the surrounding planets, an unbroken circle, an inexhaustible communion, radiant emanations which should generate and maintain activity and motion, thought and sentiment, which should keep the flame of life burning everywhere! Let us think of the emanations from souls dwelling in the sun descending upon the earth in solar rays. Light gives existence to plants, and produces vegetable life, accompanied by sensibility. Plants, having received this sensible germ from the sun, communicate it, aided by heat likewise emanating from the sun, to animals. Let us think of the germs of souls, placed in the breasts of animals, developing themselves, becoming perfected by degrees, from one animal to another, and finishing by becoming incarnate in a human body. Let us think, then, of the superhuman being succeeding to man, springing up into the vast plains of ether, and beginning the series of numerous transmigrations which, from one step to another, will lead him to the summit of the scale of spiritual perfection, from which every material substance has been eliminated, and where the soul, thus exalted to the purest degree of its essence, penetrates into the supreme abode of happiness, and of intellectual and moral power--the sun. Such may be this endless circle, such this unbroken chain, binding together all beings in nature, and passing from the visible to the invisible world. To those persons who may declaim with severity against the system which we have ventured to put forward, we shall put a question which cannot fail to embarrass them, for science has never been able to solve it. We shall ask them how the light of the sun, and the heat which results from it, are maintained? It is evident that the enormous quantities of heat and light which the sun sends out in torrents into space, must come from a source which cannot be inexhaustible, which has need of renewal, otherwise the sun would become extinct. As there is no effect without a cause, it is plain that the inconceivable quantity of forces which the sun distributes by his burning rays, must be derived from some place. M. Guillemin, in his work on the sun, passes in review the different theories which have been adopted, up to the present day, to explain solar radiation. The following is an analysis of a chapter of M. Guillemin's work on the "Maintenance of Solar Radiation."