1936. First Edition. 318 pages. Pictorial dust jacket over red cloth. Some black and white diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Boards have light shelf wear with minor corner bumping and crushing to spine ends. All surfaces mildly tanned. Clipped jacket has light edge wear with minor tears, chipping and creasing. Some rubbing and marking to surfaces. Spine noticeably sunned. Small stamp mark to front flap.