1954. First Edition. 171 pages. Pictorial dust jacket over blue cloth. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Gilt lettering is dulled. Unclipped jacket has heavy edge wear with major tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.