1951. 7th Edition. 160 pages. Pictorial dust jacket over orange cloth. Black and white illustrations throughout. Binding remains firm. Pages and illustrations have light tanning and foxing throughout. Previous owner's inscription to front pastedown. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Light tanning to spine and edges. Foxing overall.