1891. Eleventh edition. 213 pages. No dust jacket. Pictorial cloth covered boards. Black and white diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Cracking to front hinge with netting exposed. Binding loose. A previous owner's name label to front free endpaper. Boards have heavy shelf wear with bumping and fraying to corners and crushing, fraying and tearing to spine ends and edges. All surfaces tanned and sunned, particularly spine. Some additional moderate marks and staining.