toa little problem of town-grading. The contour curves (dottedlines) show the natural form of the ground. The horizontalcutting planes are one yard apart. By means of these curvesthe references of all the street intersections are so assumed asto give the proper drainage slope to each street. These…
Topographical drawing
Internet Archive Book Images · Robarts - University of Toronto · No known copyright restrictions (public domain). Free to use for anything.
