. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. SZ2ZZI Fig. 27.âSection of Stone Abutment for Drain Outlet. especially where ditch banks are subject to shifting, is the box \\ith wire bars at the end, as shown in Fig. 28. 'ZzzizTT-y /y/-/â /// â¢f777. Fig 28.âBox Outlets for Tile Drains. The Dox should be not less than 12 feet long and set on the grade line of the drain. White-oak planks 2 inches thick should be used if they can be had, other- wise pine or hemlock. Large galvanized iron wires secured in a ver
. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. SZ2ZZI Fig. 27.âSection of Stone Abutment for Drain Outlet. especially where ditch banks are subject to shifting, is the box \\ith wire bars at the end, as shown in Fig. 28. 'ZzzizTT-y /y/-/â /// â¢f777. Fig 28.âBox Outlets for Tile Drains. The Dox should be not less than 12 feet long and set on the grade line of the drain. White-oak planks 2 inches thick should be used if they can be had, other- wise pine or hemlock. Large galvanized iron wires secured in a vertical position about 2 inches apart across the end of the box will make a serviceable 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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