1950. Second edition. 1132 pages. Pictorial dust jacket over pictorial cloth covered boards. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding slightly loose. Previous owner's name to front pastedown. Tape marks to endpapers. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. Unclipped jacket has heavy edge wear with tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.