1957. Third Edition. 309 pages. No dust jacket. Red cloth with gilt lettering. Black and white photographic plates and graphs. Pages wrinkled from former water staining; text and images unaffected. Pages and plates are bright and clear with light foxing and tanning to text block edges, pastedowns and free endpapers. Pen inscription to front pastedown. Binding is slightly loose but pages remain attached. Boards have minor corner bumping and edgewear with mild staining, tanning and scuffing overall. Spine has light tanning with soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean.