1955. Reprint. 299 pages. No dust jacket. Orange boards with red lettering to spine and front. Black and white illustrations and diagrams as well as black and white photographic plates throughout. Binding remains firm. Minor cracking to gutters. Pages, plates and illustrations remain bright and clear with minimal tanning. A little foxing to front free endpaper. Boards have mild edge wear with slight rubbing to surfaces. Slight crushing to spine ends and couple of minor bumped corners. Mild tanning to spine with lettering darkened.