1950. Tenth Edition. 590 pages. No dust jacket. Blue cloth boards with lettering. Clean pages with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen inscription and stickers to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Minor sunning to spine and edges with crushing to spine ends. Visible wear marks to boards.