. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. 78 ENGINEERING FOR LAND DRAINAGE. The P7'ofile, A profile represents a vertical section of the line of survey. The level notes are platted on profile paper on which the vertical and horizontal scales are different to render irregularities of surface more distinct through exaggeration. The method of profiling the level notes is shown in Fig. 15. In this diagram, one space, hori-. po f t^ 23466789 10 Fig, 15.—Profile of Main A. (See Notes.) 11 zontal scale, equals
. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. 78 ENGINEERING FOR LAND DRAINAGE. The P7'ofile, A profile represents a vertical section of the line of survey. The level notes are platted on profile paper on which the vertical and horizontal scales are different to render irregularities of surface more distinct through exaggeration. The method of profiling the level notes is shown in Fig. 15. In this diagram, one space, hori-. po f t^ 23466789 10 Fig, 15.—Profile of Main A. (See Notes.) 11 zontal scale, equals 50 feet, and one small space, ver- tical scale, equals .2 foot of elevation, which are con- venient scales in making profiles for drainage work. A profile represents the surface line correctly and should be employed in fixing upon a grade line when the work to be done is of any considerable magnitude. To determine a grade, draw a thread over the profile, adjusting it to certain points of maximum and minimum grade, until a desirable grade line is represented by the thread. Transfer the elevation of points where changes of grade occur to the corresponding points on the notes, and compute the cuts for each station• The. 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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