1942. Reprint. 334 pages. No dust jacket. Blue cloth. Contains black and white illustrated diagrams. Pages remain bright and clear with light tanning and foxing. Previous owner's pencil inscription to front free endpaper. Light scuffing to text-block edges. Binding remains firm. Boards have moderate edge wear with bumping to corners and rubbing to surfaces. Mild tanning to spine and edges. Scuffing and light marking overall. Faint white marking to boards. Small dents to board edges. Book is slightly bowed and forward leaning.