Springfield, IL: Charles C. Thomas, (1950). First edition. Publication #77 of the American Lecture Series. INSCRIBED and SIGNED by Dr. Coon on the front endpaper. Each author explores his field of interest in this lecture series. Light offset to the endpapers, otherwise near fine in dust jacket darkened on spine, with chipping to spine ends, a small closed tear along top edge of front panel, and edges sunned, lightly chipped and rubbed.