Note 91 — Chapter XIII · WATER OF SOILS (Continued).
Reading edition
Such tests can be readily made by any one, by digging a pit to four or five feet depth, and supplying water to a shallow basin dug into the surface 8 to 12 inches distant from the vertical wall of the pit. The descent of the water is then readily observed on the vertical side of the pit nearest to the water basin. Preliminary tests with soil probe (see chap. 10, p. 177).