The Clays of the Piedmont Province, Virginia is a book written by Heinrich Ries in 1917. The book provides a comprehensive analysis of the geological formations and clay deposits found in the Piedmont region of Virginia. Ries explores the various types of clays found in the area, including kaolin, ball clay, and fire clay, and discusses their properties and uses in various industries, such as ceramics, glassmaking, and construction. The book also...