Blackdog Media
Classic Reader: "Two Pioneers" by Elia W. Peattie
Elia W. Peattie wrote about life in the West. "Two Pioneers" recounts the tale of a priest who makes friends with a "lady of the night". Read the full text on this site.
Biology Pages
Kimball's Biology Pages: Soil Horizons
This site is a personal site from John W. Kimball, a Harvard Professor, that contains a brief definition of both topsoil and subsoil. A drawing supplements the text.