1917. No Edition Remarks. 192 pages. No dust jacket. Blue cloth boards with gilt lettering to spine. Black and white frontispiece. Black and white illustrations and tables throughout. Binding remains firm. Crinkling to pages at gutters. Pages are moderately tanned throughout. Previous owner's inscription to front endpaper. Thumb marking present. Occasional foxing. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Tanning to spine and edges. Book has a slight forward lean.