We cut through the sand, and four or five feet into the clay, and laid one course only of two-inch pipe-tiles at the bottom. As this was designed for a catch-water, and not merely to take in water at the bottom, in the usual way, we filled the trench, after covering the tiles with tan, with coarse sand above the level of the clay, and put clay upon the top. We believe no water has ever crossed this drain, which operates as perfectly as an open ditch, to catch all that flows upon it. The manure cellar was then dry enough, but the other cellar was wanted for roots and implements, and the water was constantly working up through the soft clay bottom, keeping it of the consistency of mortar, and making it difficult to haul out the manure, and everyway disagreeable. One more effort was made to dry this part. A drain was opened from the highway, which passes the barn, to the south corner; and about two and a half feet below the bottom of the cellar, along inside the wall, at about three feet distance from it, on two of the sides; and another in the same way, across the middle of the cellar. These, laid with two-inch tiles, and filled with gravel, were connected together, and led off to the wayside. The waste water of two watering places, one in the cellar, and another outside, supplied by an aqueduct, was conducted into the tiles, and thus quietly disposed of. The reason why the drains are filled with gravel is, that as the soft clay, in which the tiles were laid, could never have the heat of the direct rays of the sun on its surface, there might be no cracking of it, sufficient to afford passage for the water, and so this was made a catch-water to stop any water that might attempt to cross it. The work was finished last Autumn, and we have had but the experience of a single season with it; but we are satisfied that the object is attained. The surface of the implement cellar, which before, had been always soft and muddy, has ever since been as dry and solid as a highway in Summer; and the root cellar, which has a cemented bottom, is as dry as the barn floor. The manure can now be teamed out, without leaving a rut, and we are free to confess, that the effect is greater than we had deemed possible. The following cut will show at a glance, how all the drains are laid, the dotted lines representing the tile drains: [Illustration: Fig. 100.] The drain outside the barn, on the right, leads from a spring, some two hundred feet off, into the cellar and into the yard, and supplies water to the cattle, at the points indicated. The waste water is then conducted into the drains, and passes off. CHAPTER XXIII. DRAINAGE OF SWAMPS. Vast Extent of Swamp Lands in the United States.--Their Soil.--Sources of their Moisture.--How to Drain them.--The Soil Subsides by Draining.--Catch-water Drains.--Springs.--Mr. Ruffin's Drainage in Virginia.--Is there Danger of Over-draining?