1910. Fourth Edition. 303 pages. No dust jacket. Blue cloth with gilt lettering to spine. Contains a black and white diagram. Rough-cut pages are mildly tanned throughout. More pronounced to text block edges with minor foxing. Front hinge is cracked, exposing netting. Cracking to gutters however binding remains firm. Previous owner's inscription to half title page. Pen annotations and underlining throughout, with minor pencil notes to rear endpaper. Small brown stains to fore edge of text block. Occasional marks to pages. Text is not affected. Boards have slight edge wear with corner bumping. Visible tanning to spine with noticeable crushing to ends. Gilt lettering is darkened. Minor brown marks and some scratches to all surfaces. Book has a slight forward lean.