1922. First Edition. 585 pages. No dust jacket. Brown cloth boards with black lettering to spine and front. Volume 3 of 3.Black and white diagrams throughout. Binding remains firm. Crinkling to pages at gutters. Pages are moderately tanned throughout. Pencil inscription to front endpaper. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Book has a slight forward lean.