1945. 17th Impression. 686 pages. Beige pictorial dust jacket over green cloth. Black and white diagrams. Pages are moderately tanned and thumbed at the edges, with moderate foxing. Binding has remained firm. Inscription to front endpaper. Boards have been moderately rub worn. Noticeable shelf wear to corners, spine and edges. Corners are bumped and a little frayed Spine ends are crushed, with noticeable splits and chips. Moderate tanning to spine and edges. Boards are slightly bowed. Prominent forward lean to text block. The unclipped dust jacket has heavy edge wear, tears and chips. Heavy tanning to spine and edges.