1945. 9th Edition. 515 pages. No dust jacket. Blue cloth with gilt lettering to spine. Black and white diagrams throughout. Pages have moderate tanning, but text remains clear. Visible cracking to gutters, binding is firm. Small brown and black marks to text block edges and front pastedown. Previous owner's inscription to front free endpaper with paper remnants. Thumb-marking present throughout. Boards have heavy shelf-wear with visible corner bumping, exposing boards, and moderate rubbing and scratching. Noticeable water staining overall, but lettering is not obscured. Spine ends have moderate crushing with small splits. Minor loss to fore edge of front board. Book has a slight forward lean.