With this object, commence at the southern boundary of our example tract, 10 or 15 feet east of the point of outlet, and drive a straight, temporary, shallow ditch to a point a little west of the intersection of the main line _D_ with its first lateral; then carry it in a northwesterly direction, crossing _C_ midway between the silt-basin and stake _C 1_, and thence into the present line of the brook, turning all of the water into the ditch. A branch of this ditch may be run up between the lines _F_ and _G_ to receive the water from the spring which lies in that direction. This arrangement will keep the water out of the way until the drains are ready to take it. *The Outlet.*—The water being all discharged through the new temporary ditch, the old brook, beyond the boundary, should be cleared out to the final level (3.75,) and an excavation made, just within the boundary, sufficient to receive the masonry which is to protect the outlet. A good form of outlet is shown in Fig. 23. It may be cheaply made by any farmer, especially if he have good stone at hand;—if not, brick may be used, laid on a solid foundation of stout planks, which, (being protected from the air and always saturated with water,) will last a very long time. [Illustration: Fig. 23 - OUTLET, SECURED WITH MASONRY AND GRATING.] Fig. 23 - OUTLET, SECURED WITH MASONRY AND GRATING. If made of stone, a solid floor, at least 2 feet square, should be placed at, or below, the level of the brook. If this consist of a single stone, it will be better than if of several smaller pieces. On this, place another layer extending the whole width of the first, but reaching only from its inner edge to its center line, so as to leave a foot in width of the bottom stone to receive the fall of the water. This second layer should reach exactly the grade of the outlet (3.50) or a height of 3 inches from the brook level. On the floor thus made, there should be laid the tiles which are to constitute the outlets of the several drains; _i.e._, one 3-1/2-inch tile for the line from the silt-basin, two 1-1/4-inch for the lines _F_ and _G_, and one 2-1/4-inch for the main line _E_. These tiles should lie close to each other and be firmly cemented together, so that no water can pass outside of them, and a rubble-work of stone may with advantage be carried up a foot above them. Stone work, which may be rough and uncemented, but should always be solid, may then be built up at the sides, and covered with a secure coping of stone. A floor and sloping sides of stone work, jointed with the previously described work, and well cemented, or laid in strong clay or mortar, may, with benefit, be carried a few feet beyond the outlet. This will effectually prevent the undermining of the structure. After the entire drainage of the field is finished, the earth above these sloping sides, and that back of the coping, should be neatly sloped, and protected by sods. An iron