1948. Second Edition. 128 pages. Pictorial jacket over blue cloth. Contains black and white photographic frontispiece, with other plates and diagrams throughout. Pages and plates remain bright and clear, with mild foxing to edges and endpapers. Binding is firm. Previous owner's inscription to front free endpaper. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Spine is slightly sunned. Noticeable dark marks to edges of boards. Unclipped jacket. Light tanning and foxing to all surfaces. Slight edgewear with noticeable tears to front panel.