Thomas Conrad Porter Libri

In this classic biography, Schaff and Porter offer a comprehensive overview of the life and work of St. Augustine of Hippo, one of the most influential thinkers and theologians in Christian history. Drawing on Augustine's own writings as well as historical sources, this book offers an insightful and engaging portrait of a great man. This work is essential reading for scholars of Christian history and theology.

This classic work of botany provides a comprehensive listing of the grasses found in the state of Pennsylvania. Illustrated with detailed drawings and including descriptive information about the ecology and habitats of each species, this volume is an essential reference for anyone interested in the natural world.