1963. Second Edition. 721 pages. Dust jacket over green cloth with gilt lettering. Black and white graphs and illustrations throughout. Pages are bright and clear with light foxing and tanning to text block edges, pastedowns and free endpapers. Pen inscription to front free endpaper. Binding remains firm. Boards have minor corner bumping and edgewear with mild sunning and scuffing overall. Spine has light sunning with soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean. Unclipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.