1964. Second Printing. 460 pages. Blue dust jacket over grey cloth boards with gilt lettering to spine and front. Black and white diagrams, photographs & photographic plates throughout. Binding remains firm. Pages remain bright and clear with minimal tanning. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Gilt lettering is bright and clear. Book has a slight forward lean. Unclipped jacket has moderate edge wear with chips, tears and creasing. Tanning to spine and edges.