1946. Reprinted. 176 pages. Pictorial dust jacket over red cloth. Black and white diagrams throughout. 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 tanned and sunned, particularly spine ends. Unclipped jacket has heavy edge wear with large tears, chipping and creasing. All surfaces heavily tanned, particularly spine.