In what way, then, are the gravel, sand and mud disposed of when they reach the sea? As these materials are all brought from the land, they accumulate on those parts of the sea floor which border the land, rather than at a distance. We may expect to find banks of sand and gravel in shallow seas and near land, but not in the middle of the ocean. You may form some notion, on a small scale, as to how the materials are arranged on the sea bottom by examining the channel of a river in a season of drought. At one place, where the current has been strong, there may be a bank of gravel; at another place, where the currents of the river have met, you will find, perhaps, a ridge of sand which they have heaped up; while in those places where the flow of the stream has been more gentle, the channel may be covered with a layer of fine silt or mud. You remember that a muddy river may be made to deposit its mud if it overflows its banks so far as to spread over flat land which checks its flow. The more powerful a current of water, the larger will be the stones it can move along. Hence coarse gravel is not likely to be found over the bottom of the sea, except near the land, where the waves can sweep it out into the path of strong sea currents. Sand will be carried further out, and laid down in great sheets, or in banks. The finer mud and silt may be borne by currents for hundreds of miles before at last settling down upon the sea bottom. In this way, according to the nearness of the land, and the strength of the ocean currents, the sand, mud, and gravel worn from the land are spread out in vast sheets and banks over the bottom of the sea. SUNDAY READINGS. SELECTED BY THE REV. J. H. VINCENT, D.D. [_January 6._] ON SPIRITUAL CHRISTIANITY. By ISAAC TAYLOR. Read the Gospels, simply as historical memoirs; and by such aids as they alone supply, make yourself acquainted with him who is the subject of these narrations. Bring the individual conception as distinctly as possible before the mind; allow the moral sense to confer, in its own manner, and at leisure, with this unusual form of humanity. “Behold the man”—even the Savior of the world, and say whether it be not historic truth that is before the eye. The more peculiar is this form, yet withal symmetrical, the more infallible is the impression of reality we thence receive. What we have to do with in this instance, is not an undefined ideal of wisdom and goodness, conveyed in round affirmations, or in eulogies; but with a self-developed individuality, in conveying which the writers of the narrative do not appear. In this instance, if in any, the medium is transparent: nothing intervenes between the reader and the personage of the history, in whose presence we stand, as if not separated by time and space.