. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. Fig. 6.—Gridiron System. laterals into each from both sides. In draining hill- sides and wet slopes it is best to lay lateral drains down the slope, at such intervals as are required, discharging. ^ Fig. 7.—^Double-main System. into a collecting-drain. In such cases have the collect- ing drain near the base of the slope, that the laterals need not pass through a flat bottom, which would re-. Please note that these images are extracted from scanned page images th
. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. Fig. 6.—Gridiron System. laterals into each from both sides. In draining hill- sides and wet slopes it is best to lay lateral drains down the slope, at such intervals as are required, discharging. ^ Fig. 7.—^Double-main System. into a collecting-drain. In such cases have the collect- ing drain near the base of the slope, that the laterals need not pass through a flat bottom, which would re-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Elliott, Charles Gleason, 1850-1926. New York, J. Wiley
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