One gram of sand-size particles has a surface area the equivalent of three lines on this page; one gram of silt has a surface area about the same as four pages of this book; and one gram of clay-size spheres has about the same surface area as the wall of a large room in a house. Franszmeier, D.P., H. Kohnke, Soil Science Simplified (Fourth Ed.). Long Grove, IL: Waveland Press, Inc. 1995.
Surface Area maps the surface areas sand, silt and clay, utilizing the page, the book, and the wall of a large room in a house as units of measure, as presented in an unexpectedly poetic text on soil science.