1958. Second edition. 132 pages. Pictorial dust jacket over green cloth. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Dedication to front pastedown. Tape marks to endpapers. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Clipped jacket has light edge wear with minor tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.