1913. Third Edition. 564 pages. No dust jacket. Blue cloth boards with gilt lettering. Contains black and white illustrations and folded diagrams. Slight crinkling to paper at gutter. Clean pages and illustrations with noticeable tanning and foxing throughout. Tightly bound with faint thumb marking throughout. Heavier tanning to free endpapers. Pen and pencil annotations and marginalia to a few pages. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Slight crushing to spine ends and corners. Gilt lettering is darkened. Moderate sunning to spine and edges. Visible wear marks to boards.