1951. First Edition. 663 pages. No dust jacket. This is an ex-Library book. Green cloth hardback. Includes some black & white diagrams. Red marking to text block edge. Book is ex-library with expected stamps. Pages remain bright and clear with minimal tanning and foxing. Insert to front pastedown. Boards have mild edge-wear with slight rubbing to surfaces. Spine has crushing to both ends. Book has forward lean.